A researcher has arrived at a method to prevent gene expression from Drosophila embryonic genes. The following questions assume that he is using this method.
-The researcher continues to study the reactions of the embryo to these new proteins and you hypothesize that he is most likely to see which of the following (while embryonic genes are still not being expressed)?
A) The cells begin to differentiate.
B) The proteins are evenly distributed throughout the embryo.
C) Larval features begin to make their appearance.
D) Spatial axes (anterior → posterior, etc.) begin to be determined.
E) The embryo begins to lose cells due to apoptosis from no further gene expression.

Question

Quizplus · Accepted Answer

Spatial axes (anterior → posterior, etc.) begin to be determined during embryonic development before gene expression from embryonic genes. Therefore, by preventing gene expression, the researcher may still observe the establishment of spatial axes in the embryo.

A Researcher Has Arrived at a Method to Prevent Gene