Which of the Following Genes is a Maternal-Effect Gene in Drosophila

Question

Which of the following genes is a maternal-effect gene in Drosophila?
A) Dorsal
B) Bicoid
C) Nanos
D) All of these are correct.
E) None of these are correct.

Accepted Answer

Maternal-effect genes, such as Bicoid and Nanos, are crucial for early development in Drosophila. These genes are expressed by the mother and their products are deposited in the egg, influencing the embryo's development before its own genome is activated. Dorsal is also involved in establishing the embryonic axes, functioning in a pathway influenced by maternal components. Therefore, all listed options are correct examples of maternal-effect genes in Drosophila.