Gametogenesis

• Sexual reproduction


  Union of gametes
• Asexual reproduction


  No gamete involvement
• Gametogenesis


  Production, maturation, and differentiation of gametes
• Phase 1

  Primordial germ cells migrate to gonads
• Phase 2

  Proliferation by mitosis
• Phase 3

  Meiotic division: diploid (2n)=> haploid (n)
• Phase 4

  Crossing over: genetic recombination increases genetic diversity
• Transformation of sperm

  Sperm=> release of Golgi apparatus=> formation of acrosome and flagellum
• Transformation of egg

  Secondary oocyte released by secondary follicle (w/ fluid filled cavity: antrum)=> ovulation => fertilized egg: ovum
• Copulation

  Sexual union to facilitate reception of sperm by female