Gametogenesis

Spermatogenesis is the pro distribution channelion process of sperm cellatozoon cellatozoan cell. It takes place in the testes, in the narcotic tubules. Oogenesis is the production of egg prison cubicles in the ovaries. In spermatogenesis, the germinal epithelium cell divides by mitosis to constitute ace daughter spermatogonia and the former(a) becomes a daughter germinal epithelium cell. The spermatogonium undergoes a exploitation phase which develops into a primeval election spermatocyte (Diploid).In oogenesis, the germinal epithelium cell in any case divides by mitosis to form 1 oogonia and the other becomes a daughter germinal epithelium cell. The Oogonia and so goes through a growth phase and forms a primary oocyte (Diploid) contained in a primary follicle. In spermatogenesis, the primary spermatocyte (diploid) undergoes myosis 1 and cell atom to form secondary spermatocyte (haploid). Whereas the primary oocyte (Diploid) divides by meiosis, contribution so stops at prophase 1, and continues at puberty. However when division takes place, it is unequal, which forms 1 secondary oocyte (haploid) and a primary polar clay (haploid) which degenerates and dies. Now, the 2 secondary spermatocytes, divide by meiosis 2 and cell division to form spermatids (haploid). The spermatids then differentiate into sperm cells (Haploid). From puberty onwards the testes produce sperm continuously.

At all time, there are millions of sperm at all stages of development. When the sperm are fully formed, they pass pop out of the testis, into the epididymis. Here the sperm mature and gain m otility. The timing of give away depends on! the internal activity of a man. Whenever ejaculation occurs, millions of sperm are travel by muscle action on the sperm duct from the epididymis to the urethra. The secondary oocyte (haploid) and first polar be (haploid) undergoes meiosis 2 and cell division to form 1 egg (haploid) and a second polar body (haploid) which also degenerates and dies. This complete motorbike happens once per menstrual cycle and normally only one egg is produced....If you want to get a full essay, do it on our website: OrderCustomPaper.com

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