Urogenital - Reproduction

• Asexual reproduction

  • Tunicates (budding)
  • Some amazon mollies
  • Some lizards (parthenogenesis)
  • Some salamanders
• Sexual reproduction

  • Tunicates and cephalochordates
  • Most craniates
• Lamprey-hagfish

  • No reproduction ducts (only genital pores)
  • External fertilization
• Chondrichthyans

  • Accessory urinary ducts and archinephric duct for sperm passage
  • Internal fertilization
• Actinopterygii

  • Archinephric ducts
  • Sperm duct
  • External fertilization
• Amniotes

  • Archinephric duct
  • Ureter drains kidneys
  • Internal fertilization
• Genotypic sex determination

  • Birds
  • Mammals
  • Snakes, some lizards
• Temp dependent sex determination

  • Turtles
  • Many lizards
  • crocs