. who is x chromosome
" " y chromosome
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The X chromosome is one of the two sex chromosomes in humans (the other is the Y chromosome). ... Females have two X chromosomes, while males have one X and one Y chromosome. Early in embryonic development in females, one of the two X chromosomes is randomly and permanently inactivated in cells other than egg cells.
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Answer:
sex
Explanation:
a xx chromosome mix to make boy and xy chromosome mix to make girls
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