If you know that the Hox gene AbdB is expressed in the most posterior part of the abdomen in a Drosophila embryo,which conclusion about a homologous gene in humans would most likely be correct?
A) There is no homologous gene in humans,because the evolutionary distance between humans and flies is so great.
B) The homologous gene in humans is expressed only in adults,not in human embryos.
C) The homologous gene is expressed in the head of human embryos.
D) The homologous gene is expressed throughout the human embryo in roughly equal amounts.
E) The homologous gene is expressed near the rump of the human embryo.

Question

Quizplus · Accepted Answer

The fact that AbdB is expressed in the most posterior part of the abdomen in a Drosophila embryo suggests that its homologous gene in humans would likely be expressed in the most posterior part of the human embryo. Therefore, choice E, "The homologous gene is expressed near the rump of the human embryo," is the most likely conclusion.

If You Know That the Hox Gene AbdB Is Expressed