Inactivation

Thanks Kolean, the first paragraph about inactivation of the X chromosome is interesting. I didn't know that before. You have the right idea with balanced and unbalanced. What I am most wondering is whether during meiosis a fully balanced fusion ...

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... is approximately 300 bases long and can be found between 300,000 and a million times in the human genome." Transposition may result in the inactivation or changes in gene expression at the site of expression. There's a few things to go look at further. Not sure if genes turn off regularly ...

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... (d) G1 is not an obligatory phase of al cell cycles. (e) The transition from mitosis to G1 appears to result from the disappearance or inactivation of a cytoplasmic factor present during M phase. I pretty sure that part a and e are true, but i'm having trouble understanding part b and ...

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If you're a girl, this could be chromosome X inactivation. If you're a boy, then I'm not quite sure.

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... aggressiveness and slight mental retardation. If there is too much x-chromosomes, all except of one will be inactivated. But due to incomplete inactivation there will always be symptoms.

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