Question

Explain the cause responsible in a human to have sex
chromosomes as 'XXY' instead of 'XX' or XY'.​

Answer 1

HYE MATE

HERE IS UR ANSWER

A person's biological sex is determined by the sex chromosomes: females have two X chromosomes, or XX; most males have one X chromosome and one Y chromosome, or XY. Males with XXY syndrome are born with cells that have an extra X chromosome, or XXY.

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