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A human female with Turner’s syndrome:

1. has 45 chromosomes with XO.
2. has one additional X chromosome.
3. exhibits male characters.
4. is able to produce children with normal husband.

Correct answer: has 45 chromosomes with XO.

Solution

Turner syndrome in a human female is classically due to monosomy X, written as 45,X or XO. This means one sex chromosome is missing, so the total chromosome number is 45 rather than 46.

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