Homeobox Genes

http://www.dnaftb.org/dnaftb/37/concept/index.html

click on "animation"

1. How do genes determine the orientation of an embryo (dorsal, ventral, anterior, posterior)?

2. What is a "gap" gene?

3. What is a pair-rule gene?

4. Why is it likely that ancestors of fruit flies had 2 pair of wings? What gene causes them to have only one pair of wings?

5. What are hox genes? What might occur if a hox gene mutated?

6. Describe each of the following mutant flies:

kruppel mutant

fushi tarazu mutant

Ubx mutant

Antp mutant

Go to the link: "problem"

7. What will happen to an embryo that doesn't have BICOID protein?

8. What will happen if BICOID is overexpressed?

9. What kind of gene is HAIRY?

10. What kind of gene is EYELESS?