Evolution in Action on Remote Scottish Islands

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	Evolution in Action on Remote Scottish Islands

JohnWaterman

1-18-2008 10:31 AM

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1-18-2008 1:02 PM

neochonetes

Very cool! I love following genetics stories.

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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://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/b425df01-52ce-4123-9155-962285b586f8/67503D18-5FB5-4728-9910-42D913A9FD86/" 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.guardian.co.uk/science/2008/jan/18/genetics?gusrc=rss&feed=science" href="http://www.guardian.co.uk/science/2008/jan/18/genetics?gusrc=rss&feed=science" style="font-size: 11px;">www.guardian.co.uk</a></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://www.guardian.co.uk/science/2008/jan/18/genetics?gusrc=rss&feed=science"><P>The mysterious case of St Kilda's vanishing black sheep, animals whose ancesters were roaming the group of remote Scottish islands more than 4,000 years ago, has been solved by geneticists. </P></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.guardian.co.uk/science/2008/jan/18/genetics?gusrc=rss&feed=science">The small, horned, Soay sheep arrived before the Vikings with the first human settlers in this area of north-west Scotland. Deriving from the earliest domestic flocks, they are mostly black or brown, but some have a light sandy coat. In the past few decades the numbers of black animals in the flocks have declined</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.guardian.co.uk/science/2008/jan/18/genetics?gusrc=rss&feed=science">why, since the darker sheep are larger so more resilient to the severe winters that regularly kill off the more frail animals</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.guardian.co.uk/science/2008/jan/18/genetics?gusrc=rss&feed=science">the study began with a scan of the sheep's genes</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.guardian.co.uk/science/2008/jan/18/genetics?gusrc=rss&feed=science">the tests revealed a remarkable demonstration of evolution in action</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.guardian.co.uk/science/2008/jan/18/genetics?gusrc=rss&feed=science">black sheep get their dark coats from a single gene</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.guardian.co.uk/science/2008/jan/18/genetics?gusrc=rss&feed=science">inherited alongside another gene for bulkiness</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.guardian.co.uk/science/2008/jan/18/genetics?gusrc=rss&feed=science">But the lighter coloured sheep</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.guardian.co.uk/science/2008/jan/18/genetics?gusrc=rss&feed=science">seemed to have evolved as the fitter form, inheriting also genes for extra toughness and reproductive ability</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/67503D18-5FB5-4728-9910-42D913A9FD86/blog/" title="blog or email this clip"><img src="http://content6.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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