Gametogenesis

Spermatogenesis is the pro distribution channelion process of spermatozoon 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 creative epithelial tissue cell divides by mitosis to nervous strain ace daughter spermatogonia and the former(a) becomes a daughter germinal epithelium cell. The spermatogonium undergoes a exploitation phase which develops into a base spermatocyte (Diploid).In oogenesis, the germinal epithelium cell overly divides by mitosis to form 1 oogonia and the other becomes a daughter germinal epithelium cell. The Oogonia soce goes through a growth phase and forms a primary quill 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 then stop s at prophase 1, and continues at puberty. However when division takes place, it is unequal, which forms 1 secondary oocyte (haploid) and a freshman 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 extinct of the testis, into the epididymis. Here the sperm mature and gain motil ity. The timing of tucker out depends on th! e internal activity of a man. Whenever ejaculation occurs, millions of sperm are travel by muscle action along the sperm duct from the epididymis to the urethra. The secondary oocyte (haploid) and first polar remains (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 usually only one egg is produced....If you want to get a full essay, do it on our website: OrderCustomPaper.com

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