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

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  •  Horse and donkey (0+ / 0-)

    We all know that these 2 species interbreed but mules are usually sterile. The 2 parent species differ by one chromosome pair. A mule has an odd chromosome number and that is a big problem for its reproducing.
    btw the gender of the parents makes a difference. The opposite of a mule is called a hinny. A mule concentrates the more useful traits of both species and a hinny concentrates the less useful ones.
    Now back to our line. One reason to suspect the Australopithecus/Homo juncture as the point of chromosome fusion is that some strong-survival traits would greatly help to compensate for a change of chromosome number in a new species.

    Censorship is rogue government.

    by scott5js on Wed Mar 13, 2013 at 11:59:18 AM PDT

    [ Parent ]

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