- #1
jaumzaum
- 434
- 33
At a certain point during embryonic development (late blastula), one of the X chromosomes in the female condenses and become a Barr body. It's random if this X chromosome will be paternal or maternal, creating some cells with paternal X chromosome and some cells with maternal X chromosome. We know that all children of these cells will keep the rule, and if the paternal chromosome was initially condensed, all the children will have this chromosome condensed.
My question is, why does this happen? Because, in my understanding, for the polar body do duplicate it has first to decondensate, and then, when the lyonization occurs again, isn't it random which X chromosome will condense?
@Ygggdrasil
My question is, why does this happen? Because, in my understanding, for the polar body do duplicate it has first to decondensate, and then, when the lyonization occurs again, isn't it random which X chromosome will condense?
@Ygggdrasil