tag:blogger.com,1999:blog-7447544468792389936.post5564733035902976283..comments2024-02-26T21:18:23.165-08:00Comments on CHIMERAS: Another genetic puzzle: why is mitochondrial DNA only inherited from the mother's side?Anonymoushttp://www.blogger.com/profile/09922888671399516573noreply@blogger.comBlogger9125tag:blogger.com,1999:blog-7447544468792389936.post-6505132356533552222015-04-25T13:19:14.878-07:002015-04-25T13:19:14.878-07:00I recently matched with someone as a 4th-to 5th co...I recently matched with someone as a 4th-to 5th cousin through my mtdna results. But when I asked to view their tree I found my fathers ancestors. How is this possible through an mtdna test??Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-7447544468792389936.post-17642101982572758672015-04-21T13:39:14.307-07:002015-04-21T13:39:14.307-07:00Perhaps the mtDNA has something to do with the dev...Perhaps the mtDNA has something to do with the development and recognition of the embryo by the mother. So if the embryo did not destroy the paternal mtDNA, the mother may identify the embryo as a foreign object and destroy it. This is just a hypothesis of mine that popped in to my head as I read this. But I find this subject fascinating!Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-7447544468792389936.post-28801671709699676892014-12-24T14:37:53.132-08:002014-12-24T14:37:53.132-08:00This question entered my head and I came to this r...This question entered my head and I came to this reading via google. First I thought only the nucleus of male gamete enters the egg cell membrane. The article mentions the process of autophagosome that destroys the foreign mitochondria analogous to the response of immune system when the internal environment is introduced with foreign body. This suggests that this process started in early stage of evolutionary eukaryotic simple organisms.Anonymoushttps://www.blogger.com/profile/17748292511459880969noreply@blogger.comtag:blogger.com,1999:blog-7447544468792389936.post-41369864798742857382013-08-22T08:43:36.962-07:002013-08-22T08:43:36.962-07:00Thanks for the reference, Jack, I just downloaded ...Thanks for the reference, Jack, I just downloaded it and I'll read it tonight! Anonymoushttps://www.blogger.com/profile/09922888671399516573noreply@blogger.comtag:blogger.com,1999:blog-7447544468792389936.post-32212564606541004352013-08-22T08:12:04.379-07:002013-08-22T08:12:04.379-07:00You might be interested in C. Barr et al (2005) In...You might be interested in C. Barr et al (2005) Inheritance and recombination of mitochondrial genomes in plants, fungi and animals - http://onlinelibrary.wiley.com/doi/10.1111/j.1469-8137.2005.01492.x/full - which discusses this phenomena across a range of organisms. Fascinatingly it seems that it's actually evolved multiple times and there's even some spectacularly weird variants: male bivalves have maternal mtDNA in their somatic tissue but paternal mtDNA in their gonads.Jack Aidleynoreply@blogger.comtag:blogger.com,1999:blog-7447544468792389936.post-46992478621245489052012-05-17T10:17:05.005-07:002012-05-17T10:17:05.005-07:00I always read (and very much appreciate!) comments...I always read (and very much appreciate!) comments, that's why I have it set up that they end up right in my inbox! :-)<br /><br />That's very interesting, thank you!Anonymoushttps://www.blogger.com/profile/09922888671399516573noreply@blogger.comtag:blogger.com,1999:blog-7447544468792389936.post-55201967267371021592012-05-17T10:09:24.188-07:002012-05-17T10:09:24.188-07:00On the off chance you read comments on old posts a...On the off chance you read comments on old posts a couple hypotheses for only maternal mt inheritance: 1) after hundreds of replilcation cycles, sperm mitochondria are much more likely to damaged or defective. 2) Swimming sperm mt are under selection pressure to be fast, and if paternal mt were inherited mt would be less adaptable to other selective pressures. Neither of these are my hyp, btw.robnoreply@blogger.comtag:blogger.com,1999:blog-7447544468792389936.post-24538956474575568322011-12-02T15:41:26.328-08:002011-12-02T15:41:26.328-08:00I guess you could put it that way. Indeed, from an...I guess you could put it that way. Indeed, from an evolutionary perspective, mitochondria are wonderful things.<br /><br />Thanks for reading!Anonymoushttps://www.blogger.com/profile/09922888671399516573noreply@blogger.comtag:blogger.com,1999:blog-7447544468792389936.post-42895515584568117412011-12-02T15:24:04.665-08:002011-12-02T15:24:04.665-08:00wow, I was struck by reading this that not only ar...wow, I was struck by reading this that not only are we chimerical (hybridized with a whole other domain of life, no less), we are both haploid and diploid.wkgriffithshttps://www.blogger.com/profile/13730001319947226409noreply@blogger.com