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Recently, Darin Griffin, a professor of genetics at the University of Kent, wrote an article for the Australian interpretive news website Dialogue, "The Y chromosome is disappearing - what will happen to men?"
he says the Y chromosome is rapidly degenerating and is expected to disappear completely in 4.6 million years.
But even that doesn't mean men will disappear.
the Y chromosome carries the SRY gene that determines whether the embryo is male (XY) or female (XX).
in other words, at least for now, possession of the Y chromosome is a sufficient requirement for men to become.
but in turn, the Y chromosome is not a necessary chromosome for life, as Professor Darin Griffin wrote: "After all, women without the Y chromosome also live well.
" the Y chromosome is atrophy compared to the two normal X chromosomes that women have.
Darin Griffin explained that more than 160 million years ago, the "original-Y" chromosome was the same size and inclusion of the X chromosome.
", however, there is a fundamental flaw in the Y chromosome: unlike all other chromosomes that have two copies in biological cells, the Y chromosome appears only in a separate copy, passing from father to son.
" means that it cannot eliminate harmful genetic mutations through genetic recombination, and thus escape the fate of degradation.
but even if the scientists' predictions come true, that doesn't mean men will disappear. At that time, the SRY gene that determines gender genetics will migrate to other chromosomes, but the chromosome will eventually face a similar fate to the Y chromosome,
Darin Griffin said.
Source: China Youth Daily.