NEET BIOLOGY

Detailed explanation-1: -After fertilization, the development of a multicellular organism proceeds by a process called cleavage, a series of mitotic divisions whereby the enormous volume of egg cytoplasm is divided into numerous smaller, nucleated cells. These cleavage-stage cells are called blastomeres.

Detailed explanation-2: -The rapid, multiple rounds of cell division are termed cleavage. After the cleavage has produced over 100 cells, the embryo is called a blastula.

Detailed explanation-3: -The cells in cleavage stage embryos are known as blastomeres. Note that the blastomeres in this embryo, and the eight-cell embryo below, are distinctly round.

Detailed explanation-4: -Mitosis is a cell division process wherein a parent cell divides into daughter cells. Cleavage on the other hand is the second step in the process of cell division that is responsible for splitting of the parent cell into two daughter cells.

Detailed explanation-5: -Cleavage refers to the early cell divisions that occur as a fertilized egg begins to develop into an embryo.