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Certain genetic conditions linked to the Y chromosome can affect a man’s ability to father children, underlining its ...

Human biological sex is determined by the sex chromosomes X and Y. In most cases, females possess two X chromosomes, while males have one X and one Y. However, there is some evidence that the Y ...

The Y chromosome is the keeper of family history on the male side. Written in the letters of DNA, it carries a record of a man's paternal ancestors. Here is your chance to try your hand at being a ...