Reasons for the development of secondary sexual characters:

Secondary sexual characters:

1. Secondary sexual characters are those characters that are controlled by the hormones that are released at the time of puberty.
2. Some of the secondary sexual characters are given below:

Changes developed in boys

1. Boys develop the heavier muscular body, wide shoulders, and narrow hips.
2. Enlargement of the voice box leads to a much deeper voice.

Changes developed in girls

1. Rounded hips and breast development.
2. Matured ovaries start to release a mature ovum.

Reasons for the development of sexual characters:

1. In males, sexual characteristics are developed due to the increased levels of the hormone testosterone.
2. In females, sexual characteristics are developed due to the increased levels of the hormone estrogen.