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Human being’s 44 chromosomes + single X - XO abnormality causes

1. Down’s syndrome
2. Kinefelter’s syndrome
3. Turner’s syndrome
4. Edward’s syndrome

Correct answer: Turner’s syndrome

Solution

An XO karyotype means monosomy X, which is Turner’s syndrome. It occurs in females with 45 chromosomes total and is caused by the absence of one sex chromosome.

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