Question

Sex-Determination in Human being... How does ot take place?

Answer 1

Human beings consist of 23 pair of chromosome.In which 22pair of chromosome are same and are called autosomes while 1 pair (23 pair ) of chromosome are called sex chromosome .
sex determination in human being involved two step .
1)Y contain male gamete combine with any female gamete to produce male child (boy)

2)X contain male gamete combine with any female gamete to produce feme child (girl)

Answer 2

Chromosomal sex is determined at the time of fertilization; a chromosome from the sperm cell, either X or Y, fuses with the X chromosome in the egg cell. Gonadal sex refers to the gonads, that is the testis or ovaries, depending on which genes are expressed.