The male gonads are called the testes and the female gonads are called the ovaries. Gonads are organs which produce sex cells. The human egg or sperm contains 92 chromosomes. Crossing over involves an exchange of chromatid segments between chromosomes. The first division of meiosis is when crossing over occurs.
Spermatogenesis occurs in the prostate gland.
The head of a human sperm contains much stored food to provide the sperm with energy. While meiosis results in a halving of the chromosome number, the chromosome number is maintained in an organism by the processes of meiosis and fertilization. Spermatogenesis results in the formation of one sperm from one meiotic cell division. Oogenesis is the production of the egg. Oogenesis results in the formation of one egg and three polar bodies from one meiotic division.