How do men determine the sex of a baby?

Answer:
Because men have chromosomes that are XY- X being female Y being male. Females only have chromosomes that are XX -both which are female. So the male having female and male chromosomes allows the DNA of the fetus to take the same chromosomes of the father (XY) and be a boy or two of the X chromosomes (XX) and be a girl.
First answer by Kharrima. Last edit by Kharrima. Contributor trust: 967 [recommend contributor recommended]. Question popularity: 1 [recommend question].

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