Q. 494.9( 11 Votes )

State whether the following statements are true or false:

(a) The estrogen hormone develops deeper voice in males at puberty.

(b) Menstruation stops in men permanently around the age of 45 to 50 years.

(c) Man (father) is responsible for the sex of the body.

(d) The sex chromosomes in all the gametes (sperms) of a man are not identical.

(e) Half the female gametes contain X chromosomes and the other half contain Y chromosomes.

(f) It is the sperm which determines the sex of a child.

(g) Each normal cell in our body contains 23 chromosomes and the other half contain Y chromosomes.

(h) A girl should not be allowed to work in the kitchen during menstruation.

(i) A woman (mother) is responsible for the sex of her child.

(j) Metamorphosis in insects (like silk moth) is brought about by thyroxine hormone.

Answer :

(a) False, the estrogen hormone is a female hormone secreted by ovaries.

(b) False, menstruation stops in woman permanently around the age of 45 to 50 years.


(c) True, Man (father) is responsible for the sex of the body.


(d) True, the sex chromosomes in all the gametes (sperms) of a man are not identical.


(e) False, female gametes contain only X chromosomes.


(f) True, Sperm determines the sex of a child.


(g) False, each normal cell in our body contains 23 pair of chromosomes.


(h) False, it is a myth and not facts. A girl should not be allowed to work in the kitchen during menstruation.


(i) False, man is responsible for the sex of his child.


(j) False, Metamorphosis in insects (like silk moth) is brought about by insect hormone.


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