Average_Cat_Lover

Average_Cat_Lover t1_jbj4q18 wrote

> The y chromosome is decreasing because there's either pressure to do so, or no pressure to stop it.

It seems that sex chromosomes (as well as "parasitic" beta chromosomes) are always under a pressure to degrade over time. But, IIRC there is also a counter-pressure for new chromosomes to arise before this.

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