What is reason for meiosis

The purpose of meiosis is to reduce the normal diploid cells to haploid cells called gametes. In humans, the special haploid cells resulting from meiosis are eggs for females and sperm for males

Meiosis. Chromosome abnormalities usually happen as a result of an error in cell division. Meiosis is the name used to describe the cell division that the egg and sperm undergo when they are developing. Normally, meiosis causes a halving of chromosome material, so that each parent gives 23 chromosomes to a pregnancy.