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in Biology by (45.1k points)

Assertion : In mammals, the female secondary sexual characters are developed by gonadotropins.

Reason : Gonadotropins are secreted by Graafian follicle.

(a) Both A and R are true and R is the correct explanation of A

(b) Both A and R are true but R is not correct explanation of A

(c) A is true but R is false

(d) A and R are false

1 Answer

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Best answer

Correct option (d) A and R are false

Explanation :

The female secondary sexual characters are developed b), estrogens. Estrogens are steroid hormones secreted by growing ovarian follicles. It includes estradiol, estriol and estrone. This hormone is responsible for the development of female secondary sexual and accessory characters. In humans it is also formed in the adrenal cortex, testis and foetoplacental unit.

Gonadotropic hormones (LH and FSH) are secreted by the anterior lobe of pituitary gland. LH is responsible for ovulation and transforms Graafian follicle into corpus luteum and FSH stimulates spermatogenesis and maturation of Graafian follicle and secretion of estrogen in ovaries.

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