>>> AFAIK, only some sections of the X chromosome are inactivated. This means
>>> that some genes on the X escape inactivation. I think it's also possible
>>> for mutations to occur that affect the inactivation of particular genes.
>>>>How would you account for sex-linked traits unless regions of both X
>>chromosomes were active?
>> Why would you _need_ a gene to be active on _both_ chromosomes??
> Wouldn't one or the other be enough?
>
Yes, of course. What I was trying to account for was the different
frequencies. I guess I'm to assume that the difference in frequencies
of traits such as R-G colour blindness is not as large as I thought.
Ron
