In an experiment with amphibian embryos,cells from a blastomere that was divided in two developed normally under which condition?
A) When they contained at least half of the gray crescent
B) Only when cells did not have the gray crescent
C) Only when cells received the full amount of gray crescent
D) When cells were cleaved bilaterally
E) When cells were cleaved radially

Question

In an experiment with amphibian embryos,cells from a blastomere that was divided in two developed normally under which condition?  
A) When they contained at least half of the gray crescent
B) Only when cells did not have the gray crescent
C) Only when cells received the full amount of gray crescent
D) When cells were cleaved bilaterally
E) When cells were cleaved radially

Quizplus · Accepted Answer

The gray crescent is a portion of the egg with cytoplasmic components that help in development. Cells that receive at least half of the gray crescent are able to develop normally because they contain the necessary cytoplasmic components. Therefore, the cells that developed normally in the experiment were likely the ones that received at least half of the gray crescent during cleavage.

In an Experiment with Amphibian Embryos,cells from a Blastomere That