Both males and females have
approximately 20,000 to 25,000 protein-coding genes in their genome. The total
number of genes in humans is relatively consistent between males and females,
as the majority of genes are located on the autosomes (non-sex chromosomes), of
which individuals have two copies (one from each parent). However, males have
one X chromosome and one Y chromosome, while females have two X chromosomes.
Therefore, there are some genes on the sex chromosomes that are present in
different dosages between males and females. For example, males have genes on
the Y chromosome that females do not possess, and females have two copies of
genes on the X chromosome, while males have only one copy.
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