1. BIOL 3300 Vertebrate Zoology: Ectotherms - Herpetology

3. How do reptiles reproduce?
Viviparity

4. How do reptiles reproduce?
Oviparity

5. How do reptiles reproduce?
Virgin Birth?!?
Gekkonids, lacertids, teiids (~33%), xantusiids & a typhlopid

6. How is gender determined?
GSD & TSD ♀ ♂ ♂ ♀ ♀ ♂ ♀

7. How is gender determined?
Testosterone in yolk
At ♂ temperatures… 5 α-reductase induced
Testosterone => Dihydrotestosterone
Gonads => testes
Testes => testosterone
Testosterone in yolk
At ♀ temperatures… aromatase induced
Testosterone => Estradiol
Gonads => ovaries
Ovaries => estrogen

8. How does reproduction cycle?

9. How does reproduction cycle?

10. How does “IT” happen?

11. What are the parts of an amniotic egg?

12. How does development occur?

13. How does “IT” happen?

14. How does “IT” happen?
Alligator mississippiensis

15. How does life history vary?