Final answer:
The 23rd set of chromosomes determines sex and consists of two chromosomes, XX in females and XY in males.
Step-by-step explanation:
The 23rd set of chromosomes determines sex. It consists of two chromosomes, known as the sex chromosomes. In females, the 23rd pair of chromosomes is XX, while in males it is XY. The presence of the Y chromosome determines male characteristics, while the absence of the Y chromosome determines female characteristics.
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