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Cake day: June 2nd, 2023

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  • Normally no, since one gonosome comes from each parent: The mother (XX) and the father (XY).

    If somehow a series of unfortunate meioses occurred to create a zygote that had two Y chromosomes and no X chromosome, the foetus would absolutely not be viable, since the X chromosome contains many essential genes, while the Y chromosome is a truncated version that has less than half the information