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View Diary: "Y-Chromosomal Adam" possibly farther back in time than thought (237 comments)

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  •  Unless it was introduced by a virus... (0+ / 0-)

    in which case an entire population might gain or lose a trait...

    YES WE DID -- AGAIN. FOUR MORE YEARS.

    by raincrow on Wed Mar 13, 2013 at 02:23:32 AM PDT

    [ Parent ]

    •  ALL of the children would have needed to (0+ / 0-)

      been infected with the virus (quite possible), and the virus would then have had to been integrated into their genomes in an identical manner (virtually if not totally impossible!).

      Even though 8% (a lot!!) of the human genome is viral in origin, these viruses were incorporated over the course of hundreds of millions of years in our ancestors.  Overall, it's a slow and uncertain process.

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