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. All sperm require some form of liquid to swim to the eggs. A hermaphrodite has functional organs of both sexes in one organism.
Most birds have internal fertilization but external development.
The coming together of doubled homologous chromosomes in meiosis is called crossing over. Most bony fish have external fertilization and external development. T Multiple Choice Section 1.