Which of the following graphs illustrates the pattern of Krüppel expression in a Drosophila embryo with a loss-of-function mutation in the zygotic hunchback gene?
A)graph A
B)graph B
C)graph C

Question

Which of the following graphs illustrates the pattern of Krüppel expression in a Drosophila embryo with a loss-of-function mutation in the zygotic hunchback gene? 
A)graph A 
B)graph B 
C)graph C

Quizplus · Accepted Answer

A loss-of-function mutation in the zygotic hunchback gene would cause a delay in the anterior-posterior patterning of the embryo. This delay would result in a lack of activation of the Krüppel gene in the posterior region of the embryo. Graph B illustrates this pattern with a delay in the expression of Krüppel in the posterior region. Graphs A and C do not show this delay pattern.

Which of the Following Graphs Illustrates the Pattern of Krüppel