Question

Which of the following is true for the inheritance of sex chromosomes in humans?

• A. The gametes from each parent have either an X or a Y chromosome.
• B. The gamete from the mother has either an X or a Y chromosome.
• C. The gamete from the father has either an X or a Y chromosome.
• D. The gamete from the father only has an X chromosome.
• E. The gamete from the mother only has a Y chromosome.

Answer 1

Answer: (C)

The gamete from the father has either an X or a Y chromosome.

Human follows XX-XY mechanism of sex determination wherein females have XX and males have XY sex chromosomes. During meiosis, all the gametes produced by females contain only the X chromosome (22 A + X), whereas males produce two kinds of gametes, 1/2 gametes with X- and 1/2 with Y-chromosome (22 A + X and 22 A + Y). Thus, the correct answer is option C.