Gametogenesis+Ovum+and+Sperm

=**Gametogenesis**= Process cells(haploid/diploid) undergo in order for gametes(ovum and sperm) to be formed.

=Male and Female(Similarity)= The process for both female and male commence with a germ cell. This germ cell will undergo the process of mitosis which will result with two germ cells created. One of these will serve the purpose of being a reserve, which is able to go through the process again. The second one will undergo meiosis.

=**Male**= A male produces about 250 million sperms everyday. These will undergo the process of spermatogenesis, or the production of sperm, in the testes. During this process four spermatids are produced. It begins as a spermatogonium (Diploid), then it undergoes mitosis and turns into a primary spermatocyte (Diploid). Afterwards, it undergoes meiosis I which makes it turn into a Secondary Spermatocyte (Haploid). Following that, it undergoes Meiosis II making it turn into a spermatid (Haploid). Finally, after maturation occurs, it turns into sperm (Haploid). In comparison to oogenesis, spermatogenesis occurs faster.

=**Female**= Rather than producing millions of germ cells daily, a female will produce one egg per month, from puberty until menopause. The process is reffered to as oogenesis, which occurs in the ovaries. During oogenesis, meiosis I will always occur when the female is a fetus. It begins as an oogonium (Diploid) which undergoes mitosis and turns into a primary oocyte (Diploid). Following that, it undergoes meiosis I in which one of the polar bodies(Haploid) and also a secondary oocyte (Haploid) is created. Then, it undergoes meiosis II. During meiosis II the same will occur in which the primary oocyte produces the secondary oocyte and the polar body. The secondary oocyte ends up undergoing Meiosis II and if fertilization occurs, it will become a second polar body (Haploid) which also dies and an ovum is produced which eventually becomes a mature egg.

=**Ovum and Sperm**= An ovum is made up of a jelly coat, yold droplets,and the nucleus. The jelly coat serves as an outer layer which surrounds the egg. The inside contains the yolk droplets and the nucleus. Attached to the ovum is a polar body. On the other hand, a sperm has a tail. This tail is attached to the mitochondria, which is connected to the acrosome which helps pierce through the ovum.