1. Ch16 Limb Formation

4. Limb Disc surrounded by Limb Field

5. Limb Disc surrounded by Limb field What happens when limb disc is removed?

6. Limb Buds What determines type of limb?

8. Mutual Induction Effect of AER on Limb Development

9. AER is necessary for limb development

11. Sonic Hedgehog Expression

12. Hox Gene Expression

13. Feedback between AER and ZPA

14. Digit formation Shhh gene expression BMP concentration

15. Inhibition of cell death by inhibiting BMP

16. Which tissue controls Programmed Cell Death? Meso Ecto Duck leg + Chicken leg  ? Chick leg + Duck leg  ? What triggers Programmed Cell Death?