If an amphibian zygote is manipulated so that the first cleavage plane fails to divide the gray crescent, then ________.
A) the daughter cell with the entire gray crescent will die
B) both daughter cells will develop normally, because amphibians are totipotent at this stage
C) only the daughter cell with the gray crescent will develop normally
D) both daughter cells will develop abnormally

Question

Quizplus · Accepted Answer

The gray crescent of an amphibian zygote is critical for normal development, as it contains important developmental determinants. If the first cleavage plane fails to divide the gray crescent, only the daughter cell with the gray crescent will have these determinants and develop normally. The other daughter cell will lack these crucial factors and will not develop normally.

If an Amphibian Zygote Is Manipulated So That the First