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class="blocks"> <h1 class="title archive-month">Archive for <span class="altText">September, 2011</span></h1> <div class="divider"></div>  <div id="post-4088" class="hentry post post-1 odd author-mkhalfan category-eugenicsarchive clear-block"> <a class="post-thumb size-post-thumbnail alignleft" href="http://blogs.dnalc.org/2011/09/28/iq-tests-as-a-measure-of-intelligence/"><img width="100" height="100" src="http://blogs.dnalc.org/wp-content/uploads/2011/09/Howard-Knox-100x100.jpg" class="attachment-post-thumbnail wp-post-image" alt="Howard Knox" /></a> <h2 class="title"><a href="http://blogs.dnalc.org/2011/09/28/iq-tests-as-a-measure-of-intelligence/" rel="bookmark" title="Permanent Link: IQ Tests as a Measure of Intelligence">IQ Tests as a Measure of Intelligence</a></h2> <div class="post-date"> <p class="day">Sep 28th</p> </div> <div class="post-info clear-block with-thumbs"> <p class="author alignleft">Posted by <a href="http://blogs.dnalc.org/author/mkhalfan/" title="Posts by Mohammed Khalfan ">Mohammed Khalfan</a> in <a href="http://blogs.dnalc.org/category/sitetopics/eugenicsarchive/">Eugenics Archive</a> </p> <p class="comments alignright"><a href="http://blogs.dnalc.org/2011/09/28/iq-tests-as-a-measure-of-intelligence/#comments" class=" comments">1 comment</a></p> </div> <div class="post-content clear-block"> <p>Many of the old theories relating to eugenics were tied deeply to intelligence levels as predicted by IQ tests. As a matter of fact, popular IQ tests that are still in use today have their roots in the eugenics community. But just how well does an IQ test fare as a measure of intelligence?</p> <p>Before we can measure something, intelligence in this case, we must define it. This presents a challenge on its own. How do we define intelligence? Merriam-Webster defines intelligence as:</p> <ol> <li>the ability to learn or understand or to deal with new or trying situations. also: the skilled use of <a class="more-link" href="http://blogs.dnalc.org/2011/09/28/iq-tests-as-a-measure-of-intelligence/">More ></a></li></ol> </div> </div>   <div id="post-4069" class="hentry post post-2 even alt author-jwatkins category-yourgenesyourhealth post_tag-ad post_tag-alzheimers post_tag-brain post_tag-brain-damage post_tag-cognition post_tag-disease post_tag-early-onset post_tag-late-onset post_tag-memory-loss post_tag-neurodegeneration post_tag-neurodegenerative-diseases post_tag-neurons post_tag-ygyh clear-block"> <a class="post-thumb size-post-thumbnail alignleft" href="http://blogs.dnalc.org/2011/09/27/will-insulin-come-to-the-rescue-of-ad-patients/"><img width="100" height="100" src="http://blogs.dnalc.org/wp-content/uploads/2011/09/insulin-spray-Alzheimers-100x100.jpg" class="attachment-post-thumbnail" alt="insulin-spray-Alzheimers" /></a> <h2 class="title"><a href="http://blogs.dnalc.org/2011/09/27/will-insulin-come-to-the-rescue-of-ad-patients/" rel="bookmark" title="Permanent Link: Will insulin come to the rescue of AD patients?">Will insulin come to the rescue of AD patients?</a></h2> <div class="post-date"> <p class="day">Sep 27th</p> </div> <div class="post-info clear-block with-thumbs"> <p class="author alignleft">Posted by <a href="http://blogs.dnalc.org/author/jwatkins/" title="Posts by Jermel Watkins ">Jermel Watkins</a> in <a href="http://blogs.dnalc.org/category/sitetopics/yourgenesyourhealth/">Your Genes, Your Health</a> </p> <p class="comments alignright"><a href="http://blogs.dnalc.org/2011/09/27/will-insulin-come-to-the-rescue-of-ad-patients/#comments" class=" comments">1 comment</a></p> </div> <div class="post-content clear-block"> <p><a href="http://blogs.dnalc.org/wp-content/uploads/2011/09/insulin-spray-Alzheimers2.jpg"></a>Alzheimer disease (AD) is a neurodegenerative disease of the brain that is divided into early- and late-onset groups. AD is characterized by the build up of amyloid plaques, neurofibrillary tangles and the loss of connections between neurons. It is the most common type of dementia especially in the elderly. The exact causes of AD are elusive at the moment but are most likely the result of genetics and other factors. Scientist have been working hard to identify individual and or groups of genes responsible for the disease. Although the scientific community has identified may genes involved in early and late <a class="more-link" href="http://blogs.dnalc.org/2011/09/27/will-insulin-come-to-the-rescue-of-ad-patients/">More ></a></p> </div> <div class="post-tags"> <a href="http://blogs.dnalc.org/tag/ad/" rel="tag" title="AD (1 topics)">AD</a>, <a href="http://blogs.dnalc.org/tag/alzheimers/" rel="tag" title="Alzheimer's (7 topics)">Alzheimer's</a>, <a href="http://blogs.dnalc.org/tag/brain/" rel="tag" title="brain (19 topics)">brain</a>, <a href="http://blogs.dnalc.org/tag/brain-damage/" rel="tag" title="brain damage (3 topics)">brain damage</a>, <a href="http://blogs.dnalc.org/tag/cognition/" rel="tag" title="cognition (2 topics)">cognition</a>, <a href="http://blogs.dnalc.org/tag/disease/" rel="tag" title="disease (13 topics)">disease</a>, <a href="http://blogs.dnalc.org/tag/early-onset/" rel="tag" title="early onset (1 topics)">early onset</a>, <a href="http://blogs.dnalc.org/tag/late-onset/" rel="tag" title="late onset (1 topics)">late onset</a>, <a href="http://blogs.dnalc.org/tag/memory-loss/" rel="tag" title="memory loss (1 topics)">memory loss</a>, <a href="http://blogs.dnalc.org/tag/neurodegeneration/" rel="tag" title="neurodegeneration (3 topics)">neurodegeneration</a>, <a href="http://blogs.dnalc.org/tag/neurodegenerative-diseases/" rel="tag" title="neurodegenerative diseases (3 topics)">neurodegenerative diseases</a>, <a href="http://blogs.dnalc.org/tag/neurons/" rel="tag" title="neurons (4 topics)">neurons</a>, <a href="http://blogs.dnalc.org/tag/ygyh/" rel="tag" title="ygyh (7 topics)">ygyh</a> </div> </div>   <div id="post-4065" class="hentry post post-3 odd author-williams category-g2conline post_tag-bipolar-disorder post_tag-epigenetics post_tag-next-generation-sequencing post_tag-schizophrenia clear-block"> <a class="post-thumb size-post-thumbnail alignleft" href="http://blogs.dnalc.org/2011/09/23/different-sides-of-the-same-coin-twins-and-epigenetics/"><img width="100" height="100" src="http://blogs.dnalc.org/wp-content/uploads/2011/09/twins-100x100.jpg" class="attachment-post-thumbnail wp-post-image" alt="Twins" /></a> <h2 class="title"><a href="http://blogs.dnalc.org/2011/09/23/different-sides-of-the-same-coin-twins-and-epigenetics/" rel="bookmark" title="Permanent Link: Different sides of the same coin; twins and epigenetics">Different sides of the same coin; twins and epigenetics</a></h2> <div class="post-date"> <p class="day">Sep 23rd</p> </div> <div class="post-info clear-block with-thumbs"> <p class="author alignleft">Posted by <a href="http://blogs.dnalc.org/author/williams/" title="Posts by Jason Williams ">Jason Williams</a> in <a href="http://blogs.dnalc.org/category/sitetopics/g2conline/">G2C Online</a> </p> <p class="comments alignright"><a href="http://blogs.dnalc.org/2011/09/23/different-sides-of-the-same-coin-twins-and-epigenetics/#comments" class="no comments">No comments</a></p> </div> <div class="post-content clear-block"> <p><a href="http://blogs.dnalc.org/wp-content/uploads/2011/09/twins.jpg"></a>Most people are aware that monozygotic (identical) twins share the exactly the same DNA, but it might be surprising to know that traits and diseases with genetic components can vary between these twins. In the case of some psychiatric disorders with strong genetic components, there are many pairs of identical twins in which only one twin actually develops the disease. In bipolar disorder for example a monozygotic twin has only a<a href="http://jmg.bmj.com/content/36/8/585.abstract"> 40%-70% chance of also having bipolar disorder if their twin has been diagnosed</a>. If bipolar disorder really has a strong genetic component, then why isn’t this number 100%?</p> <p>Of course, we <a class="more-link" href="http://blogs.dnalc.org/2011/09/23/different-sides-of-the-same-coin-twins-and-epigenetics/">More ></a></p> </div> <div class="post-tags"> <a href="http://blogs.dnalc.org/tag/bipolar-disorder/" rel="tag" title="bipolar disorder (2 topics)">bipolar disorder</a>, <a href="http://blogs.dnalc.org/tag/epigenetics/" rel="tag" title="Epigenetics (4 topics)">Epigenetics</a>, <a href="http://blogs.dnalc.org/tag/next-generation-sequencing/" rel="tag" title="next generation sequencing (2 topics)">next generation sequencing</a>, <a href="http://blogs.dnalc.org/tag/schizophrenia/" rel="tag" title="schizophrenia (8 topics)">schizophrenia</a> </div> </div>   <div id="post-4056" class="hentry post post-4 even alt author-mcbrien category-dnafromthebeginning category-dnainteractive post_tag-dna post_tag-evolution post_tag-genetics post_tag-natural-selection post_tag-teachers post_tag-teaching clear-block"> <a class="post-thumb size-post-thumbnail alignleft" href="http://blogs.dnalc.org/2011/09/21/can-i-teach-that/"><img width="100" height="100" src="http://blogs.dnalc.org/wp-content/uploads/2011/09/200px-Charles_Darwin_seated_crop-100x100.jpg" class="attachment-post-thumbnail" alt="Charles Darwin" /></a> <h2 class="title"><a href="http://blogs.dnalc.org/2011/09/21/can-i-teach-that/" rel="bookmark" title="Permanent Link: Can I Teach That?">Can I Teach That?</a></h2> <div class="post-date"> <p class="day">Sep 21st</p> </div> <div class="post-info clear-block with-thumbs"> <p class="author alignleft">Posted by <a href="http://blogs.dnalc.org/author/mcbrien/" title="Posts by Amanda McBrien ">Amanda McBrien</a> in <a href="http://blogs.dnalc.org/category/sitetopics/dnafromthebeginning/">DNA From The Beginning</a> </p> <p class="comments alignright"><a href="http://blogs.dnalc.org/2011/09/21/can-i-teach-that/#comments" class="no comments">No comments</a></p> </div> <div class="post-content clear-block"> <p><a href="http://blogs.dnalc.org/wp-content/uploads/2011/09/200px-Charles_Darwin_seated_crop.jpg"></a>Recently I worked with a group of graduate students who volunteered to be science mentors for students in New York City. They were being trained in a small set of hands-on labs designed to introduce genetics in an engaging, informal environment. At some point during the training, we touched upon genetic mutations and variation. I mentioned that it was a perfect segway into discussion of natural selection and evolution. One participant raised her hand and asked, “Are we allowed to teach that?” My initial response was surprise. I said, “Of course!” It is unfortunate though, that as science educators we should even <a class="more-link" href="http://blogs.dnalc.org/2011/09/21/can-i-teach-that/">More ></a></p> </div> <div class="post-tags"> <a href="http://blogs.dnalc.org/tag/dna/" rel="tag" title="dna (36 topics)">dna</a>, <a href="http://blogs.dnalc.org/tag/evolution/" rel="tag" title="Evolution (9 topics)">Evolution</a>, <a href="http://blogs.dnalc.org/tag/genetics/" rel="tag" title="genetics (12 topics)">genetics</a>, <a href="http://blogs.dnalc.org/tag/natural-selection/" rel="tag" title="natural selection (3 topics)">natural selection</a>, <a href="http://blogs.dnalc.org/tag/teachers/" rel="tag" title="teachers (1 topics)">teachers</a>, <a href="http://blogs.dnalc.org/tag/teaching/" rel="tag" title="teaching (9 topics)">teaching</a> </div> </div>   <div id="post-4049" class="hentry post post-5 odd author-nisselle category-insidecancer post_tag-brain post_tag-cancer post_tag-cancerous post_tag-cholesterol post_tag-research post_tag-signaling post_tag-treatment post_tag-tumor clear-block"> <a class="post-thumb size-post-thumbnail alignleft" href="http://blogs.dnalc.org/2011/09/19/brain-tumors-snack-on-cholesterol/"><img width="100" height="100" src="http://blogs.dnalc.org/wp-content/uploads/2011/09/feature8-100x100.png" class="attachment-post-thumbnail" alt="Cancer cell" /></a> <h2 class="title"><a href="http://blogs.dnalc.org/2011/09/19/brain-tumors-snack-on-cholesterol/" rel="bookmark" title="Permanent Link: Brain tumors snack on cholesterol">Brain tumors snack on cholesterol</a></h2> <div class="post-date"> <p class="day">Sep 19th</p> </div> <div class="post-info clear-block with-thumbs"> <p class="author alignleft">Posted by <a href="http://blogs.dnalc.org/author/nisselle/" title="Posts by Amy Nisselle ">Amy Nisselle</a> in <a href="http://blogs.dnalc.org/category/sitetopics/insidecancer/">Inside Cancer</a> </p> <p class="comments alignright"><a href="http://blogs.dnalc.org/2011/09/19/brain-tumors-snack-on-cholesterol/#comments" class="no comments">No comments</a></p> </div> <div class="post-content clear-block"> <strong>We all know cholesterol can be bad for us, and we need to watch our intake of eggs, cream and butter. But scientists have just discovered that some brain cancer cells love to snack on cholesterol too.</strong> <p>Researchers at the University of California Los Angeles and Ohio State University Comprehensive Cancer Center are investigating a new treatment for glioblastoma, the deadliest form of brain cancer. Their paper, out this week in <em><a title="Cancer Discovery Journal" href="http://cancerdiscovery.aacrjournals.org/" target="_blank">Cancer Discovery</a>, </em>shows how blocking a mechanism involved in cell metabolism and triggered by a cancer gene can reduce brain tumors.</p> <p>Glioblastoma affects about 18,500 Americans each year, with less than <a class="more-link" href="http://blogs.dnalc.org/2011/09/19/brain-tumors-snack-on-cholesterol/">More ></a></p> </div> <div class="post-tags"> <a href="http://blogs.dnalc.org/tag/brain/" rel="tag" title="brain (19 topics)">brain</a>, <a href="http://blogs.dnalc.org/tag/cancer/" rel="tag" title="Cancer (25 topics)">Cancer</a>, <a href="http://blogs.dnalc.org/tag/cancerous/" rel="tag" title="cancerous (1 topics)">cancerous</a>, <a href="http://blogs.dnalc.org/tag/cholesterol/" rel="tag" title="cholesterol (2 topics)">cholesterol</a>, <a href="http://blogs.dnalc.org/tag/research/" rel="tag" title="Research (4 topics)">Research</a>, <a href="http://blogs.dnalc.org/tag/signaling/" rel="tag" title="signaling (1 topics)">signaling</a>, <a href="http://blogs.dnalc.org/tag/treatment/" rel="tag" title="treatment (10 topics)">treatment</a>, <a href="http://blogs.dnalc.org/tag/tumor/" rel="tag" title="tumor (2 topics)">tumor</a> </div> </div>   <div id="post-4037" class="hentry post post-6 even alt author-opinedac category-dnabarcoding clear-block"> <a class="post-thumb size-post-thumbnail alignleft" href="http://blogs.dnalc.org/2011/09/16/how-many-species-are-on-earth/"><img width="100" height="100" src="http://blogs.dnalc.org/wp-content/uploads/2011/09/Fungi_of_Saskatchewan-Wikipedia-100x100.jpg" class="attachment-post-thumbnail" alt="Fungi_of_Saskatchewan Wikipedia" /></a> <h2 class="title"><a href="http://blogs.dnalc.org/2011/09/16/how-many-species-are-on-earth/" rel="bookmark" title="Permanent Link: How Many Species are on Earth?">How Many Species are on Earth?</a></h2> <div class="post-date"> <p class="day">Sep 16th</p> </div> <div class="post-info clear-block with-thumbs"> <p class="author alignleft">Posted by <a href="http://blogs.dnalc.org/author/opinedac/" title="Posts by Oscar Pineda-Catalan ">Oscar Pineda-Catalan</a> in <a href="http://blogs.dnalc.org/category/sitetopics/dnabarcoding/">DNA Barcoding</a> </p> <p class="comments alignright"><a href="http://blogs.dnalc.org/2011/09/16/how-many-species-are-on-earth/#comments" class="no comments">No comments</a></p> </div> <div class="post-content clear-block"> <p>For several years scientists have tried to estimate the number of species living on Earth. This is not an easy question to answer and multiple approaches have been developed to calculate how large Earth’s biodiversity is. All of the estimates obtained so far have a large prediction range, hundreds of thousands or even millions of species from the smallest estimates to the largest ones. On top of this shaming ignorance, our planet’s biodiversity is highly threatened. Solid evidence indicates that we are facing a massive extinction event, driven unfortunately by our own activities. The most recent evidence indicates that a <a class="more-link" href="http://blogs.dnalc.org/2011/09/16/how-many-species-are-on-earth/">More ></a></p> </div> </div>   <div id="post-4026" class="hentry post post-7 odd author-setton category-dnainteractive clear-block"> <h2 class="title"><a href="http://blogs.dnalc.org/2011/09/15/biological-warfare/" rel="bookmark" title="Permanent Link: Biological Warfare">Biological Warfare</a></h2> <div class="post-date"> <p class="day">Sep 15th</p> </div> <div class="post-info clear-block "> <p class="author alignleft">Posted by <a href="http://blogs.dnalc.org/author/setton/" title="Posts by Tedi Setton ">Tedi Setton</a> in <a href="http://blogs.dnalc.org/category/sitetopics/dnainteractive/">DNA Interactive</a> </p> <p class="comments alignright"><a href="http://blogs.dnalc.org/2011/09/15/biological-warfare/#comments" class="no comments">No comments</a></p> </div> <div class="post-content clear-block"> <p>Scientists at the Universities of Nottingham and Maastricht have engineered a strain of bacteria that may be able to <a href="http://www.eurekalert.org/pub_releases/2011-09/sfgm-hsb090111.php">fight cancer</a>!</p> <p><em>Clostridium sporogenes</em> are anaerobic soil dwellers which cannot survive in the presence of oxygen. Researchers have genetically modified these bacteria so that they produce an enzyme that activates a cancer drug. It turns out that the centers of solid cancer tumors contain very little oxygen. Researchers hope to inject cancer patients’ tumors with the engineered <em>Clostridium </em>spores, which would not survive in the rest of the oxygen-rich body. After a tumor is infected with the <em>Clostridium</em>, a patient would also be <a class="more-link" href="http://blogs.dnalc.org/2011/09/15/biological-warfare/">More ></a></p> </div> </div>   <div id="post-4014" class="hentry post post-8 even alt author-cutillo category-yourgenesyourhealth post_tag-dna post_tag-egg post_tag-embryo post_tag-ethics post_tag-genes post_tag-genetic-disease post_tag-in-vitro-fertilization post_tag-preimplantation-genetic-diagnosis post_tag-sperm post_tag-technique post_tag-technology clear-block"> <a class="post-thumb size-post-thumbnail alignleft" href="http://blogs.dnalc.org/2011/09/12/4014/"><img width="100" height="100" src="http://blogs.dnalc.org/wp-content/uploads/2011/09/Human_genetics1-100x100.jpg" class="attachment-post-thumbnail wp-post-image" alt="Human_genetics" /></a> <h2 class="title"><a href="http://blogs.dnalc.org/2011/09/12/4014/" rel="bookmark" title="Permanent Link: Made to Order">Made to Order</a></h2> <div class="post-date"> <p class="day">Sep 12th</p> </div> <div class="post-info clear-block with-thumbs"> <p class="author alignleft">Posted by <a href="http://blogs.dnalc.org/author/cutillo/" title="Posts by Jennifer Galasso ">Jennifer Galasso</a> in <a href="http://blogs.dnalc.org/category/sitetopics/yourgenesyourhealth/">Your Genes, Your Health</a> </p> <p class="comments alignright"><a href="http://blogs.dnalc.org/2011/09/12/4014/#comments" class="no comments">No comments</a></p> </div> <div class="post-content clear-block"> <p class="MsoNormal">Preimplantation genetic diagnosis (PGD) is a technique that allows scientists to screen embryos after fertilization through In Vitro Fertilization (IVF), to prevent the transmission of serious genetic diseases for couples who are at risk.<span> </span>It also can be used to screen the egg and sperm before fertilization occurs.<span> </span>Only unaffected embryos will be transferred to the uterus for implantation.<span> </span></p> <p class="MsoNormal"> </p> <a href="http://blogs.dnalc.org/wp-content/uploads/2011/09/nrg953-f11.jpg"></a><p class="wp-caption-text">Image from Nature Reviews Genetics 3, 941-955 (December 2002)</p> <p class="MsoNormal">While this technology offers the hope to increase the success of IVF, it does raise some concerns about choosing a child in order to meet the needs and desires of parents.<span> </span>While most cases seem to have <a class="more-link" href="http://blogs.dnalc.org/2011/09/12/4014/">More ></a></p> </div> <div class="post-tags"> <a href="http://blogs.dnalc.org/tag/dna/" rel="tag" title="dna (36 topics)">dna</a>, <a href="http://blogs.dnalc.org/tag/egg/" rel="tag" title="egg (1 topics)">egg</a>, <a href="http://blogs.dnalc.org/tag/embryo/" rel="tag" title="embryo (1 topics)">embryo</a>, <a href="http://blogs.dnalc.org/tag/ethics/" rel="tag" title="ethics (2 topics)">ethics</a>, <a href="http://blogs.dnalc.org/tag/genes/" rel="tag" title="genes (11 topics)">genes</a>, <a href="http://blogs.dnalc.org/tag/genetic-disease/" rel="tag" title="genetic disease (7 topics)">genetic disease</a>, <a href="http://blogs.dnalc.org/tag/in-vitro-fertilization/" rel="tag" title="in vitro fertilization (2 topics)">in vitro fertilization</a>, <a href="http://blogs.dnalc.org/tag/preimplantation-genetic-diagnosis/" rel="tag" title="Preimplantation Genetic Diagnosis (1 topics)">Preimplantation Genetic Diagnosis</a>, <a href="http://blogs.dnalc.org/tag/sperm/" rel="tag" title="sperm (1 topics)">sperm</a>, <a href="http://blogs.dnalc.org/tag/technique/" rel="tag" title="technique (1 topics)">technique</a>, <a href="http://blogs.dnalc.org/tag/technology/" rel="tag" title="technology (5 topics)">technology</a> </div> </div>   <div id="post-3998" class="hentry post post-9 odd author-aiello category-g2conline post_tag-adhd post_tag-attention-deficit-hyperactive-disorder post_tag-copy-number-variants post_tag-farmer post_tag-hunter post_tag-hyperactivity post_tag-impulsivity post_tag-inattention clear-block"> <a class="post-thumb size-post-thumbnail alignleft" href="http://blogs.dnalc.org/2011/09/09/genetic-insight-into-adhd/"><img width="100" height="100" src="http://blogs.dnalc.org/wp-content/uploads/2011/09/student-100x100.jpg" class="attachment-post-thumbnail wp-post-image" alt="ADHD child" /></a> <h2 class="title"><a href="http://blogs.dnalc.org/2011/09/09/genetic-insight-into-adhd/" rel="bookmark" title="Permanent Link: Genetic Insight into ADHD">Genetic Insight into ADHD</a></h2> <div class="post-date"> <p class="day">Sep 9th</p> </div> <div class="post-info clear-block with-thumbs"> <p class="author alignleft">Posted by <a href="http://blogs.dnalc.org/author/aiello/" title="Posts by Jennifer Aiello ">Jennifer Aiello</a> in <a href="http://blogs.dnalc.org/category/sitetopics/g2conline/">G2C Online</a> </p> <p class="comments alignright"><a href="http://blogs.dnalc.org/2011/09/09/genetic-insight-into-adhd/#comments" class=" comments">1 comment</a></p> </div> <div class="post-content clear-block"> <p>Attention-Deficit Hyperactive Disorder, more commonly known as ADHD is one of the most common neuropsychiatric disorders and is the most commonly diagnosed behavioral disorder of children. It affects about 7 percent of school-age children in the United States; affecting more boys than girls. This disorder is characterized by inattentiveness, hyperactivity and/or impulsivity that are out of the normal range for child development.</p> <p> </p> <p><a href="http://blogs.dnalc.org/wp-content/uploads/2011/09/hyperactivity.jpg"></a>A diagnosis of ADHD is based on the persistence of several conditions for 6 or more months. Inattention is characterized by a child being easily distracted, missing details, forgetting things, and difficulty in focusing, among others. Hyperactivity can be <a class="more-link" href="http://blogs.dnalc.org/2011/09/09/genetic-insight-into-adhd/">More ></a></p> </div> <div class="post-tags"> <a href="http://blogs.dnalc.org/tag/adhd/" rel="tag" title="adhd (2 topics)">adhd</a>, <a href="http://blogs.dnalc.org/tag/attention-deficit-hyperactive-disorder/" rel="tag" title="Attention-Deficit Hyperactive Disorder (1 topics)">Attention-Deficit Hyperactive Disorder</a>, <a href="http://blogs.dnalc.org/tag/copy-number-variants/" rel="tag" title="Copy number variants (1 topics)">Copy number variants</a>, <a href="http://blogs.dnalc.org/tag/farmer/" rel="tag" title="Farmer (1 topics)">Farmer</a>, <a href="http://blogs.dnalc.org/tag/hunter/" rel="tag" title="Hunter (1 topics)">Hunter</a>, <a href="http://blogs.dnalc.org/tag/hyperactivity/" rel="tag" title="hyperactivity (1 topics)">hyperactivity</a>, <a href="http://blogs.dnalc.org/tag/impulsivity/" rel="tag" title="impulsivity (1 topics)">impulsivity</a>, <a href="http://blogs.dnalc.org/tag/inattention/" rel="tag" title="inattention (1 topics)">inattention</a> </div> </div>   <div id="post-3990" class="hentry post post-10 even alt author-mckechni category-dnafromthebeginning post_tag-blind post_tag-circadian-rhythms post_tag-fish post_tag-light post_tag-mutation post_tag-photoreceptors clear-block"> <a class="post-thumb size-post-thumbnail alignleft" href="http://blogs.dnalc.org/2011/09/08/rhythm-of-the-night/"><img width="100" height="100" src="http://blogs.dnalc.org/wp-content/uploads/2011/09/blind-cave-fish-100x100.jpg" class="attachment-post-thumbnail" alt="blind-cave-fish" /></a> <h2 class="title"><a href="http://blogs.dnalc.org/2011/09/08/rhythm-of-the-night/" rel="bookmark" title="Permanent Link: Rhythm of the Night">Rhythm of the Night</a></h2> <div class="post-date"> <p class="day">Sep 8th</p> </div> <div class="post-info clear-block with-thumbs"> <p class="author alignleft">Posted by <a href="http://blogs.dnalc.org/author/mckechni/" title="Posts by Erin McKechnie ">Erin McKechnie</a> in <a href="http://blogs.dnalc.org/category/sitetopics/dnafromthebeginning/">DNA From The Beginning</a> </p> <p class="comments alignright"><a href="http://blogs.dnalc.org/2011/09/08/rhythm-of-the-night/#comments" class="no comments">No comments</a></p> </div> <div class="post-content clear-block"> <p><a href="http://blogs.dnalc.org/wp-content/uploads/2011/09/ergo.jpg"></a>Circadian rhythms, or cycles of activity during a 24 hour period, are highly conserved across species. While we have much to learn about these daily patterns of life, scientists have found an organism that may offer new insight.</p> <p>The timing of this internal clock is related to the amount of exposure to light. How do circadian rhythms work in organisms that are not exposed to light? A Somalian cavefish, <em>Phreatichthys andruzzii, </em><em>is a blind species that has been living without light for approximately </em>1.4 to 2.6 million years!</p> <p>Researchers compared the cave fish to zebrafish during exposures to 12 hour period of <a class="more-link" href="http://blogs.dnalc.org/2011/09/08/rhythm-of-the-night/">More ></a></p> </div> <div class="post-tags"> <a href="http://blogs.dnalc.org/tag/blind/" rel="tag" title="blind (1 topics)">blind</a>, <a href="http://blogs.dnalc.org/tag/circadian-rhythms/" rel="tag" title="circadian rhythms (1 topics)">circadian rhythms</a>, <a href="http://blogs.dnalc.org/tag/fish/" rel="tag" title="fish (1 topics)">fish</a>, <a href="http://blogs.dnalc.org/tag/light/" rel="tag" title="light (1 topics)">light</a>, <a href="http://blogs.dnalc.org/tag/mutation/" rel="tag" title="mutation (5 topics)">mutation</a>, <a href="http://blogs.dnalc.org/tag/photoreceptors/" rel="tag" title="photoreceptors (1 topics)">photoreceptors</a> </div> 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class="menuList recentcomm"> <li class="clear-block"><a title="Posted in: DNA DAY 2010: What, me worry about my DNA?" class="fadeThis" href="http://blogs.dnalc.org/2010/04/29/dna-day-2010-what-me-worry-about-my-dna/#comment-8491"><span class="avatar"><img alt='' src='http://1.gravatar.com/avatar/d378d3a40a3590dd63b538282ae6b78a?s=32&d=http%3A%2F%2F1.gravatar.com%2Favatar%2Fad516503a11cd5ca435acc9bb6523536%3Fs%3D32&r=G' class='avatar avatar-32 photo' height='32' width='32' /></span><span class="entry">Mohammed Khalfan: <span class="details"> Hi Traci, you should check this website out http://www.23andme.com/ - just might be what you're...</span></span></a></li> <li class="clear-block"><a title="Posted in: IQ Tests as a Measure of Intelligence" class="fadeThis" href="http://blogs.dnalc.org/2011/09/28/iq-tests-as-a-measure-of-intelligence/#comment-5440"><span class="avatar"><img alt='' src='http://0.gravatar.com/avatar/6b23915f2fdd2da3dc5c657112de54a5?s=32&d=http%3A%2F%2F0.gravatar.com%2Favatar%2Fad516503a11cd5ca435acc9bb6523536%3Fs%3D32&r=G' class='avatar avatar-32 photo' height='32' width='32' /></span><span class="entry">Sue: <span class="details"> I agree. IQ tests are overated. They are based on assumptions about the nature of intelligence,...</span></span></a></li> <li class="clear-block"><a title="Posted in: Cancer Overtreatment. When the solution is worse than the problem." class="fadeThis" href="http://blogs.dnalc.org/2011/12/13/cancer-overtreatment-when-the-solution-is-worse-than-the-problem/#comment-5439"><span class="avatar"><img alt='' src='http://0.gravatar.com/avatar/ad516503a11cd5ca435acc9bb6523536?s=32' class='avatar avatar-32 photo avatar-default' height='32' width='32' /></span><span class="entry">points of view: <span class="details"> On My Twitter Feed... Then I checked my personal feed and saw somebody posting the link to the...</span></span></a></li> <li class="clear-block"><a title="Posted in: Tag…You’re It!" class="fadeThis" href="http://blogs.dnalc.org/2012/01/19/tag-youre-it/#comment-5359"><span class="avatar"><img alt='' src='http://1.gravatar.com/avatar/52935aba909ed59a5789008268b14fdb?s=32&d=http%3A%2F%2F1.gravatar.com%2Favatar%2Fad516503a11cd5ca435acc9bb6523536%3Fs%3D32&r=G' class='avatar avatar-32 photo' height='32' width='32' /></span><span class="entry">talha: <span class="details"> the wonders of science i wanna be performing this epigenetic tag therapy.</span></span></a></li> <li class="clear-block"><a title="Posted in: Merry Christmas to Hemophilia Patients" class="fadeThis" href="http://blogs.dnalc.org/2011/12/15/merry-christmas-to-hemophilia-patients/#comment-5358"><span class="avatar"><img alt='' src='http://1.gravatar.com/avatar/52935aba909ed59a5789008268b14fdb?s=32&d=http%3A%2F%2F1.gravatar.com%2Favatar%2Fad516503a11cd5ca435acc9bb6523536%3Fs%3D32&r=G' class='avatar avatar-32 photo' height='32' width='32' /></span><span class="entry">talha: <span class="details"> this is just a tip of an iceberg whats gonna happen more and more can only be expected from gene...</span></span></a></li> <li class="clear-block"><a title="Posted in: DNA DAY 2010: What, me worry about my DNA?" class="fadeThis" href="http://blogs.dnalc.org/2010/04/29/dna-day-2010-what-me-worry-about-my-dna/#comment-4616"><span class="avatar"><img alt='' src='http://1.gravatar.com/avatar/fe0f32261332c54b99b24c06881c2573?s=32&d=http%3A%2F%2F1.gravatar.com%2Favatar%2Fad516503a11cd5ca435acc9bb6523536%3Fs%3D32&r=G' class='avatar avatar-32 photo' height='32' width='32' /></span><span class="entry">Traci: <span class="details"> How would I go about getting my DNA tested? Being an adopted child, we have exhausted legal alleys...</span></span></a></li> <li class="clear-block"><a title="Posted in: AIDS Cure UPDATE" class="fadeThis" href="http://blogs.dnalc.org/2011/10/15/aids-cure-update/#comment-1607"><span class="avatar"><img alt='' src='http://1.gravatar.com/avatar/997a441b2802e625590c2adc4ea2545f?s=32&d=http%3A%2F%2F1.gravatar.com%2Favatar%2Fad516503a11cd5ca435acc9bb6523536%3Fs%3D32&r=G' class='avatar avatar-32 photo' height='32' width='32' /></span><span class="entry">Heaven: <span class="details"> This is really amazing. This is just another step to curing some of the most devastating diseases...</span></span></a></li> <li class="clear-block"><a title="Posted in: Compulsive Hoarding" class="fadeThis" href="http://blogs.dnalc.org/2011/11/10/compulsive-hoarding/#comment-1245"><span class="avatar"><img alt='' src='http://0.gravatar.com/avatar/cf95176c58575d503b402764e9710135?s=32&d=http%3A%2F%2F0.gravatar.com%2Favatar%2Fad516503a11cd5ca435acc9bb6523536%3Fs%3D32&r=G' class='avatar avatar-32 photo' height='32' width='32' /></span><span class="entry">Eileen @ Space Matters: <span class="details"> You've got some very interesting info here! Here's some places to go to get do some more...</span></span></a></li> </ul> </div> </div> </div> </div> </div>  </div></li><li class="block"><div class="block-twitter clear-block" id="instance-twitterwidget-3"><h3 class="title"><span>DNALC Twitter Feed</span></h3><div class="block-div"></div><div class="block-div-arrow"></div> <div class="twitter-content clear-block" id="twitterwidget-3"> <script type="text/javascript"> /* <![CDATA[ */ // init jQuery(document).ready(function(){ jQuery.ajax({ // load tweets trough ajax to avoid waiting for twitter's response type: "GET",url: "http://blogs.dnalc.org",data: { widget_id: '3', twituser: 'dnalc', twitcount: '4', get_twitter_data: 1 }, beforeSend: function() {jQuery("#twitterwidget-3 .loading").show("slow");}, complete: function() { jQuery("#twitterwidget-3 .loading").hide("fast");}, success: function(html){ jQuery("#twitterwidget-3").html(html); jQuery("#twitterwidget-3").show("slow"); } }); }); /* ]]> */ </script> <div class="loading">Loading tweets...</div> </div> <a class="followMe" href="http://www.twitter.com/dnalc"><span>Follow me on Twitter!</span></a> </div></li><li class="block"><div class="block-jetpack_subscription_widget clear-block" id="instance-blog_subscription-3"><h3 class="title"><span><label for="subscribe-field">Subscribe to Blog via Email</label></span></h3><div class="block-div"></div><div class="block-div-arrow"></div> <a name="subscribe-blog"></a> <form action="" method="post" accept-charset="utf-8" id="subscribe-blog"> <p>Enter your email address to subscribe to this blog and receive notifications of new posts by email.</p> <p><input type="text" name="email" style="width: 95%; padding: 1px 2px" value="Email Address" id="subscribe-field" onclick="if ( this.value == 'Email Address' ) { this.value = ''; }" onblur="if ( this.value == '' ) { this.value = 'Email Address'; }" /></p> <p> <input type="hidden" name="action" value="subscribe" /> <input type="hidden" name="source" value="http://blogs.dnalc.org/2011/09/" /> <input type="hidden" name="sub-type" value="widget" /> <input type="hidden" name="redirect_fragment" value="blog_subscription-3" /> <input type="hidden" id="_wpnonce" name="_wpnonce" value="4a090d9607" /> <input type="submit" value="Subscribe" name="jetpack_subscriptions_widget" /> </p> </form> </div></li><li class="block"><div class="block-widget_meta clear-block" id="instance-meta-3"><h3 class="title"><span>Meta</span></h3><div class="block-div"></div><div class="block-div-arrow"></div> <ul> <li><a href="http://blogs.dnalc.org/wp-login.php">Log in</a></li> <li><a href="http://blogs.dnalc.org/feed/" title="Syndicate this site using RSS 2.0">Entries <abbr title="Really Simple Syndication">RSS</abbr></a></li> <li><a href="http://blogs.dnalc.org/comments/feed/" title="The latest comments to all posts in RSS">Comments <abbr title="Really Simple Syndication">RSS</abbr></a></li> <li><a href="http://wordpress.org/" title="Powered by WordPress, state-of-the-art semantic personal publishing platform.">WordPress.org</a></li> </ul> </div></li> </ul> </div> </div> </div>   <div id="footer"> <div class="page-content"> <div id="copyright"> © 2011, <a href="http://www.dnalc.org">DNA Learning Center</a>, <a href="http://www.cshl.edu">Cold Spring Harbor Laboratory</a>. 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