Gametogenesis is typically divided into these phases: 1. The extraembryonic origin of the germ cells and their migration into the gonads 2. An increase in the number of germ cells by mitosis 3. A reduction in chromosomal number by meiosis 4. Structural and functional maturation of the eggs and spermatozoa. Which of the above phases of gametogenesis is identical in males and females? Phase 1 Phase 2 Phase 3 Phase 4.