preshmister3283 preshmister3283

22-11-2017
Biology

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What event causes all female mammals to have one active x chromosome per cell instead of two?

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01-12-2017

All mammals have at least one X chromosome. Female mammals have two X chromosomes, so each of her eggs has a single X chromosome. Male mammals have XY chromosomes, meaning they can generate sperm containing the X chromosome, or sperm containing the Y. If the egg receives sperm containing the X chromosome, then the resulting individual forms ovaries, and is female.

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