Females don't have chromosome Y, they have two chromosome X's.
Therefore they don't get any Y stuff. And a mutation in one chromosome X can be mitigated by a non-mutation in the other chromosome X.
Therefore they don't get any Y stuff. And a mutation in one chromosome X can be mitigated by a non-mutation in the other chromosome X.
Since bright colours, elaborate songs, and other courtship displays tend to make male birds more vulnerable to predation, I would hypothesize that male birds also have greater trait variability due to all this risk taking. It would make for an interesting study anyway.