Question

answer in brief (only 12 lines) State one secondary sexual characters for both a girl and boy that take at puberty ?​

Answer 1

Answer:

1. Secondary sexual characters: The characters which help to distinguish the male from female are called secondary sexual characters. The characters like hair on chest under arms, development of breast, beard and moustaches are called secondary sexual characters

2.  Sex determination in unborn baby: The sex of unborn baby is determined by the sex chromosomes. An unfertilized egg always has X chromosomes. Sperms are of two types. One contains X chromosomes and the other contains Y chromosomes. If sperm contributes a Y chromosome to the egg at fertilisation, the zygote would develope into male child. If a sperm containing X chromosome fertilises the egg, the zygote would develop into a female

Explanation: