Regarding genetic sex, which of the following statements is FALSE?
a. Genetic sex is determined at the instant of conception and stays the same throughout life.
b. Males have XX chromosome pair, while females have an XY.
c. Persons with Turner's syndrome have only one X and no additional X or Y chromsomes.
d. Persons with Klinefelter's syndrome have an XXY chromosome combination.
ANSWER: b
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