Abstract
A HUMAN spermatozoon contains an X or a Y chromosome, whereas every human egg contains an X chromosome. If, therefore, an X spermatozoon fertilizes an egg, the offspring is female; but if a Y spermatozoon fertilizes an egg, the offspring is male.
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ROTHSCHILD X and Y Spermatozoa. Nature 187, 253–254 (1960). https://doi.org/10.1038/187253a0
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DOI: https://doi.org/10.1038/187253a0
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