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<a href="http://www.msnbc.com/news/797315.asp?0bl=-0" target="_blank"> Mitocondria traced to father alters belief on inheritance</a>
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#2 |
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OK, assuming this is confirmed, and that it has an impact on where the mitochondria in women's reproductive cells come from:
What will this do to the age of the last common "mother" of the human race? Will she be older or younger than the previous estimates? I don't know the math behind the estimates, so can't really figure that one out. Thanks, Simian |
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#3 | |
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<a href="http://www.sciencemag.org/cgi/content/full/286/5449/2436a" target="_blank">older Science article on transmission of paternal mtDNA</a>
<a href="http://www.sciencemag.org/cgi/content/full/286/5449/2524" target="_blank">another one</a> and an abstract, same group: Quote:
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#6 | |
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However, perhaps there is some kind of selfish DNA thing going on here, where the egg cell most of the time actively kills off foreign mitochondria? nic |
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#8 |
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[QUOTE]Originally posted by Doubting Didymus:
I doubt it, as foreign mitochondria would not be a detriment to the egg cell.[/QB] But it would be a detriment to the particular mtDNA because it decreases its chance to get into the next generation. To a selfish gene, the mere presence of a different allele is "detriment". Imagine a new allele in a diploid organism which decreases the fertility of the organism by 10%, but makes it 100% sure that it will be "chosen" at meiosis. It will have a big advantage: instead of having a 50% chance at 100%, it has a 100% chance at 90%. Mark Ridley has written an excellent introduction into those topics ("Mendel's Demon"). Regards, HRG. |
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#9 | |
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<a href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=938210 9&dopt=Abstract" target="_blank">here</a> and <a href="http://www.nature.com/cgi-taf/DynaPage.taf?file=/nature/journal/v402/n6760/abs/402371a0_fs.html&dynoptions=doi1030124662" target="_blank">here</a> are some articles dealing with the elimination of sperm mitochondria by the fertilized ovum. |
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#10 |
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Heh. I suspected as much. I should be an ev. bio....
nic |
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