The Bicoid gene product is normally localized to the anterior end of the embryo. If large amounts of the product were injected into the posterior end as well, which of the following would occur?
A) Anterior structures would form in both ends of the embryo.
B) The embryo would probably show no anterior development and die.
C) The embryo would grow extra wings and legs.
D) The embryo would develop normally.
E) The embryo would grow to an unusually large size.

Question

Quizplus · Accepted Answer

The Bicoid gene product is a morphogen that specifies anterior structures in Drosophila embryos. Injecting it into the posterior end would lead to the formation of anterior structures at both ends of the embryo.

The Bicoid Gene Product Is Normally Localized to the Anterior