Question

Sex hormones ____________ and ____________ are responsible for the development of secondary sexual characters.

• A. Testosterone
• B. Estrogen

Answer 1

Testosteron:

1. Testosterone is a sex hormone that is secreted by the testes.
2. It is produced by the testes in males and ovaries in females.
3. The adrenal gland also produces small quantities in both the sexes.
4. Testosterone regulates the development of male characteristics.

Estrogen:

1. Estrogen is the female sex hormone produced in the ovaries and adrenal gland.
2. Estrogen is responsible for the development of female sexual characters like breasts in puberty and the growth of uterus lining during the menstrual cycle.
3. The characters which help to distinguish the male from female are called secondary sexual characters.
4. The characters like hair on chest and under arms, development of breast, beard and moustaches are called secondary sexual characters.

Sex hormones testosterone and oestrogen are responsible for development of secondary sexual characters.