Humans have 23 pairs of chromosomes. At bottom right are the pair of sex chromosomes XY or XX that determines sex. Mandatory Credit: BSIP/Universal Images Group/Getty Images

February 9, 2024

Humans have 23 pairs of chromosomes. At bottom right are the pair of sex chromosomes XY or XX that determines sex.
Mandatory Credit: BSIP/Universal Images Group/Getty Images

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