MOD. 12 SPERMATOGENESIS & OOGENESIS

• Gametogenesis formation of sex cells or reproductive
• Male gonad called TESTIS
• Female gonad called OVARY
• Primordial germ cell common origins of spermatozoa and oocytes—responsible for production of gametes
• Spermatogenesis formation of sperm cells located in seminiferous tubules of male gonad
• Seminiferous tubules site of germination, maturation, and transportation of sperm cells within male testes
• Primordial germ cell produce cell and become sperm mother cell or spermatogonia
• Spermatogonia most immature sperm cell from primordial germ cell
• Mitosis through growth phase the spermatogonia converted into primary spermatocyte
• Meiosis 1 results in formation of secondary spermatocyte
• Meiosis 2 it form spermatids
• Spermatids is a haploid cell
• Spermatids haploid nature and by process of spermiogenesis they get differentiated called SPERMATOZOA
• Spermiogenesis transformation of spermatids into spermatozoa
• Spermatozoa male mature cell

  How many spermatozoa produced at the end 4 haploid cell
• Oogenesis formation of ovum located in female gonad
• Ooginium immature female germ cell
• Mitosis ooginium converted into primary oocyte
• Meiosis 1 formation of secondary oocyte and first polar body
• Polar body small haploid cell formed concamitantly as an egg cell, but does not have ability to be fertilized.
• Meiosis 2 result in formation of ootid contain haploid cell and formation of second polarbody from primary polar body
• Ootid converted into OVUM
• Ovum mature egg cell of female