NEET Biology question

A man can inherit his X-chromosome from his

(A)Maternal grandmother or maternal grandfatherCorrect
(B)Father
(C)Maternal grandfather
(D)Paternal grandfather

Answer: (A)

Solution

A man (XY) always receives his X-chromosome from his mother, since his father contributes only a Y-chromosome; his mother, however, is herself heterozygous for two X-chromosomes — one inherited from her own father (the man's maternal grandfather) and one from her own mother (the man's maternal grandmother) — and which

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Question ID VK-119549