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The color test (lemmy.zip)
submitted 2 years ago* (last edited 2 years ago) by to c/lemmyshitpost@lemmy.world
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[–] 1 point 2 years ago (1 child)

Neat, thanks for the clarification. Even though the initial proportion is 50/50 for X-activation, are there scenarios where one daughter line is more prominent than the other, or does it usually remain 50/50?

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  • [–] 3 points 2 years ago

    Statistics would indicate that that is a plausible scenario.

    In addition, a uniparental disomy can occur as well. Here, the X chromosome was duplicated in the egg cell. So the exact same X chromosome is inherited twice.This is an error in meiosis. This could occur in XXX (with the third X from the father's side), XXY, or even XX. That latter one would be rare, for a uniparental disomy on X without a third sex chromosome would mean both egg and sperm cell had an error during meiosis.

    You could also see a single X (Turner Syndrome) as a 100% dominant X-chromosome. But that may be semantics.

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