Question

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 dieB) both daughter cells will develop normally, because amphibians are totipotent at this stageC) only the daughter cell with the gray crescent will develop normallyD) both daughter cells will develop abnormally

Answer 1

Option C, only the daughter cell with the gray crescent will develop normally

Step-by-step explanation:

During cell division in amphibians, the amount of grey crescent material in the crescent shaped space with in a cytoplasm is divided equally in two daughter’s cells. Only in this situation two larvas will develop. Grey crescent is basically the cytoplasmic fluid that contains essential nutrient and protein for cell development. In case if only one daughter cell receives the grey crescent material then only this daughter cell will survive . The second daughter cell will not have enough nutrient to develop

Hence, option C is correct