Explain how, offspring and parents of organisms reproducing sexually have the same number of chromosomes?

Gamete formation is the first step in sexual reproduction. The gametes have half number of chromosomes as compared to that normal body cells. Reduction division (meiosis) takes place during gamete formation which halves the number of chromosomes in both male and female gametes. The original chromosome number (as in parent) is restored after fertilisation in sexual reproduction. This explains how, offspring and parents of organisms reproducing sexually have the same number of chromosomes.