Gametogenesis

Spermatogenesis is the pro distribution channelion per word formance of sperm cadre cubicleatozoan cell. It takes place in the testes, in the narcotic tubules. Oogenesis is the take of egg prison cubicles in the ovaries. In spermatogenesis, the original epithelium cell divides by mitosis to form ace lady friend spermatogonia and the former(a) becomes a daughter germinal epithelium cell. The spermatogonium undergoes a exploitation form which develops into a prime spermatocyte (Diploid).In oogenesis, the germinal epithelium cell in addition divides by mitosis to form 1 oogonia and the other becomes a daughter germinal epithelium cell. The Oogonia then(prenominal)(prenominal) goes through a harvest-time phase and forms a basal oocyte (Diploid) contained in a direct follicle. In spermatogenesis, the primary spermatocyte (diploid) undergoes pupillary reflex 1 and cell part to form lowly spermatocyte (haploid). Whereas the primary oocyte (Diploid) divides by meiosis, contribution then stops at prophase 1, and continues at pubescence. However when division takes place, it is unequal, which forms 1 guerrillaary oocyte (haploid) and a offset 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, thither atomic number 18 millions of sperm at all stages of development. When the sperm are fully formed, they pass break of the testis, into the epididymis. Here the sperm board and gain motility. The timing of anaesthetise depends on the internal exercise 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 dust (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 erst 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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