The functions of the _______ and _______ genes in the determination of the anterior and posterior ends of a Drosophila embryo were elucidated by mutant analysis and direct _______ of cytoplasm from wild-type eggs.
A) Hunchback; Bicoid; injection
B) Hunchback; Nanos; deletion
C) Bicoid; Nanos; injection
D) Bicoid; Nanos; deletion
E) None of the above

Question

Quizplus · Accepted Answer

The functions of the Bicoid and Nanos genes in determining the anterior and posterior ends, respectively, of a Drosophila embryo were elucidated by injecting cytoplasm from wild-type eggs into mutant embryos. Hunchback is involved in the segmentation of the embryo, but not in the determination of the anterior and posterior ends. Deletion is not mentioned as a method used in the elucidation of gene function in this question. Therefore, choice C is the best option.

The Functions of the _______ and _______ Genes in the Determination

The Functions of the _ and _ Genes in the Determination