The X and Y chromosomes, commonly referred to as the sex chromosomes, are one such pair. They determine the biological sex, reproductive organs, and sexual characteristics that develop in a person.

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The big showdown is set for tonight in Melbourne between Novak Djokovic and Carlos Alcaraz. The super showdown will see Djokovic try to break a 2-match losing streak to the Spaniard in Slams after ...

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