Question

Please help with the option and explain the answer.

Based on what you know about interactions between the Krüppel gene and Hunchback protein in early Drosophila embryos (see the graphs on slide 12 from lecture 12) , predict what would happen with the pattern of Krüppel expression in the embryos in which Hunchback protein is uniformly over expressed at high levels throughout the A/P axis.

a) Expression pattern will remain the same

b) Expression will be extended to the antherior

c) Expression will be extended to the posterior

d) The second band of Krüppel will appear

e) There will be no Krüppel expression

Answer 1

e) There will be no Kruppel expression.

Because krüppel transcription appears over the region where Hunchback expression begin to declines. Here in this question Hb protein is over expressed throughout the anterior posterior axis, so no Kruppel expression occurs.

Thank you........