Man

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A man is an adult male human. Prior to adulthood, a male human is referred to as a boy. Like most other male mammals, a man's genome usually inherits an X chromosome from the mother and a Y chromosome from the father. The male fetus produces larger amounts of androgens and smaller amounts of estrogens than a female fetus. This difference in the relative amounts of these sex steroids is responsible for the physiological differences that distinguish men from women.