A WORLD WITHOUT REDHEADS...EXTINCT?


	A WORLD WITHOUT REDHEADS...EXTINCT?

fewstingscorpio

6-18-2008 12:04 AM

167 views

tags:

mutation, "recessive trait", "recessive genes", "red hair", genes, "hair color"

fewstingscorpio says:

I love a world with redheads and all the other heads. Read the rest of the article to see if they are really goners.
http://science.howstuffworks.com/redhead-extinction1.htm

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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/95f564f7-3e13-48b8-b380-c47bccc35f1c/8E979A51-CE0C-452A-AE03-90AFABD2581A/" 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://science.howstuffworks.com/redhead-extinction.htm" href="http://science.howstuffworks.com/redhead-extinction.htm" style="font-size: 11px;">science.howstuffworks.com</a></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://science.howstuffworks.com/redhead-extinction.htm"><SPAN class="articleTitle">Are redheads going extinct?</SPAN></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://science.howstuffworks.com/redhead-extinction.htm"><P>The story of redhead extinction has gone around the Internet before, most recently in 2005, with <A href="http://people.howstuffworks.com/newspaper.htm" linkindex="101">news</A> articles again citing the Oxford Hair Foundation as a source. These articles work on the mistaken assumption that <A href="http://science.howstuffworks.com/question669.htm" linkindex="102" set="yes">recessive genes</A> -- like the one for red hair -- can "die out." Recessive genes can become rare but don't disappear completely unless everyone carrying that gene dies or fails to <A href="http://health.howstuffworks.com/human-reproduction.htm" linkindex="103">reproduce</A>. So while red hair may remain rare, enough people carry the gene that, barring global catastrophe, redheads should continue to appear for some time.</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://science.howstuffworks.com/redhead-extinction.htm"><P>Red hair is caused by a mutation in the MC1R gene. It's also a recessive trait, so it takes both parents passing on a mutated version of the MC1R gene to produce a redheaded child. Because it's a recessive trait, red hair can easily skip a generation. It can then reappear after skipping one or more generations if both parents, no matter their hair color, carry the red hair gene.</P></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/8E979A51-CE0C-452A-AE03-90AFABD2581A/blog/" title="blog or email this clip"><img src="http://content7.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>