6. Summary

  • ·       Sex determination depends on chromosomes and SRY gene.
  • Sexual differentiation proceeds through chromosomal → gonadal → phenotypic stages.
  • SRY gene and testicular hormones drive male development.
  • Gametogenesis involves mitosis, meiosis, and maturation of sperm and oocytes.
  • Disorders of sexual differentiation arise from genetic or hormonal abnormalities.