Question

1 & 2) Consider cross-regulatory interactions of Drosophila gap genes (“+” and “-“ reflect positive and negative interactions. Predict the effect of the following conditions on gene expression domains – specify effect on both anterior and posterior expression boundaries.

hint: for each gap gene domain, consider anterior and posterior boundary separately

ho 100 % 90% a0% 70% 60% 50% 40% 30 % 20% 10% EL

a) loss of function of (zygotic) hb on kni expression

Answer 1

on aM U