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Why does Klinefelter's syndrome occur in boys (males) only and not in girls (females)?

Options:
A) It is related to the presence of a specific sex chromosome.
B) Boys have an extra X chromosome.
C) Girls have two X chromosomes.
D) Girls have a Y chromosome.

User Qble
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1 Answer

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Final answer:

Klinefelter's syndrome occurs in boys (males) due to the presence of an extra X chromosome (XXY genotype). This condition is not observed in girls (females) who have two X chromosomes.

Step-by-step explanation:

Klinefelter's syndrome occurs in boys (males) because it is related to the presence of a specific sex chromosome. The genotype associated with Klinefelter's syndrome is XXY. In this condition, males have an extra X chromosome, resulting in characteristics such as small testes, enlarged breasts, and reduced body hair. On the other hand, girls (females) have two X chromosomes, and having an extra X chromosome in females does not lead to the development of Klinefelter's syndrome.

User Rekin
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