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Costentin Cornomorus wrote: > . . . . As I recall, dogs > have had the curious ability to remain > interfertile: any wolf with any domestic dog with > any wild dog. (Kind of defeats the premise behind > "species", but there you have it.) . . . Or else those species are too narrowly defined. > I am unsure about any > attempts to cross a human with a near relative, > but am pretty sure such a union would be > infertile.I've heard (on the Net so it must be true) that a human-chimpanzee cross would die early in gestation because of some major inversions, i.e. stretches of DNA which flipped over at some fork of the family tree.
-- Anton Sherwood, http://www.ogre.nu/