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 gametes 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

Hint: The sperm is the main variable factor in determining the sex of the offspring because the sperm contains both types of chromosomes which indicate the sex of offspring as male or female.

Complete step by step answer:
The gamete from the father has either an X or a Y chromosome that shows the inheritance of sex chromosomes in humans. The system of sex-determination is a biological process that determines the development of sexual characteristics in an organism. The XX/XY sex-determination system is the most common or familiar sex-determination system and it is found in many animals including humans. The body of Human beings has 23 pairs of chromosomes, 22 pairs of autosomes, and 1 pair of sex chromosomes. Females producing ova are having similar types of chromosomes that are (22+X). Whereas the males producing sperms are having two different types of chromosomes that are either (22+X) or (22+Y) type chromosomes. At the time of fertilization, the sex of the offspring is determined. If the fertilization of ova (22+X) is done with the sperm of (22+X) type, this will result in the production of a female child. Whereas if the fertilization of ova (22+X) is done with the sperm of (22+Y) type, this will result in the production of a male child. Therefore, we can say that the inheritance of sex chromosomes in humans can be described by the fact that the gamete from the father has either an X or a Y chromosome.

So, the correct answer is,’The gamete from the father has either an X or a Y chromosome’.

Note:
-Sex determination is a process of development by which the sex of an individual is decided.
-The body of Human beings has 23 pairs of chromosomes, 22 pairs of autosomes, and 1 pair of sex chromosomes.
-The inheritance of sex chromosomes in humans can be described by the fact that the gamete from the father has either an X or a Y chromosome.