Question

Pair-rule genes

A. are activated by segment polarity genes
B. are activated by maternal effect genes
C. are expressed in alternating stripes
D. are activated by pair-rule genes and by maternal effect genes
E. are activated by maternal effect genes and expressed in alternating stripes

Answer 1

Pair-rule genes in Drosophila are activated by maternal effect genes and expressed in alternating stripes along the embryo.

Step-by-step explanation:

The pair-rule genes in Drosophila are responsible for dividing the developing embryo into polar segments. These genes are activated by maternal effect genes and are expressed in alternating stripes along the embryo. Therefore, the correct answer is E. are activated by maternal effect genes and expressed in alternating stripes.