[RightWingNilla]

Fast living on chromosome Y. The pattern of interspersed repeats can be used to shed light on the unusual evolutionary history of chromosome Y. Our analysis shows that the genetic material on chromosome Y is unusually young, probably owing to a high tolerance for gain of new material by insertion and loss of old material by deletion.

I think this may in part have something to do with a higher rate of mutation and chromosome crossover events during sperm meiosis (compared to egg production in females). Y chromosomes should be subject to more changes as a result of being produced exclusively in sperm (as opposed to X chromosomes and the somatic set). This is just a guess though!

[gore3000]

Y chromosomes should be subject to more changes as a result of being produced exclusively in sperm (as opposed to X chromosomes and the somatic set). This is just a guess though!

No, that seems to be correct, the male sperm seem to be more unstable than the female egg. However, to counterbalance this there is the question of insemination. I am sure that many mutants are rejected at insemination just because of being mutants, so probably the rate of mutations passed by each sex are fairly even (if they make it alive).

[AndrewC]

Y chromosomes should be subject to more changes as a result of being produced exclusively in sperm (as opposed to X chromosomes and the somatic set). This is just a guess though!

That might seem so were it not for the fact that the other chromosomes go through the same mixmaster. Now you might suppose you can purchase the other products at the local quiet grocery store, but where does she get her stock?