Genetic 'Fingerprints' of Evolution

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	Genetic 'Fingerprints' of Evolution

Silkweaver

4-14-2008 7:17 PM

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tags:

biology, evolution, molecular biology, dna

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<div style="margin: 12px 0px; font-family: arial; color: #333333; background: #ffffff; border: solid 4px #e5e5e5; width: 100%; clear: left;"><div class="CM_CTB_Content_Wrap" style="margin: 0px; padding: 0px;background-color: #ffffff;"><div style="border-bottom: solid 1px #dcdcdc; white-space: nowrap; margin-bottom: 8px; background-color: #eeeeee ;background-image: url(http://www.clipmarks.com/images/source-bg.gif); background-repeat: repeat-x; height: 24px; line-height: 24px; vertical-align: middle; padding-bottom: 4px; color: #666666; font-size: 10px;" ><a href="http://clipmarks.com/clip-to-blog/" title="see clips that are hot right now"><img src="http://content.clipmarks.com/blog_embed/56298393-f0c0-4d7f-af41-47b7a25606fa/FFD74963-A930-438F-988C-4E027EFD1985/" alt="" width="19" height="19" border="0" style="vertical-align: middle; margin: 0px 4px; display: inline; border: none; float:none;" /></a>clipped from <a title="http://www.dailygalaxy.com/my_weblog/2008/04/genetic-fingerp.html" href="http://www.dailygalaxy.com/my_weblog/2008/04/genetic-fingerp.html" style="font-size: 11px;">www.dailygalaxy.com</a></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://www.dailygalaxy.com/my_weblog/2008/04/genetic-fingerp.html">
Recent research has identified some important new fragments of DNA, though the method might sound more like market research than medical genetics: they looked at DNA across different species and asked "Okay, raise your hand/flipper/paw if this bit is important".</blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://www.dailygalaxy.com/my_weblog/2008/04/genetic-fingerp.html">
The key is "conservation".  If a genetic sequence is important, it
won't be changed too much - evolution proceeds by randomly mutating
pieces of the code, but any cell that tries tinkering too much with the
vital parts will soon find out why they're called "vital".</blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://www.dailygalaxy.com/my_weblog/2008/04/genetic-fingerp.html">Every cell
that survives has these vital sections in common, while the parts that
aren't as important tend to vary more randomly between different eras,
species or even individuals.</blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://www.dailygalaxy.com/my_weblog/2008/04/genetic-fingerp.html">The recent advance is the identification
of more such "conserved" regions in the introns.   </blockquote></div><div style="margin: 0px 6px 6px 4px;"><table style="font-size: 11px;border-spacing: 0px;padding: 0px;" cellpadding="0" cellspacing="0" width="100%"><tr><td style="background:transparent;border-width:0px;padding:0px;">&nbsp;</td><td align="right" style="background:transparent;border-width:0px;padding:0px;width:107px" width="107"><a href="http://clipmarks.com/share/FFD74963-A930-438F-988C-4E027EFD1985/blog/" title="blog or email this clip"><img src="http://content9.clipmarks.com/images/c2b-foot.png" border="0" alt="blog it" width="107" height="17" style="border-width:0px;padding:0px;margin:0px;" /></a></td></tr></table></div></div>

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