ANATOMY

Detailed explanation-1: -produced during cleavage are called blastomeres. The divisions are mitotic-i.e., each chromosome in the nucleus splits into two daughter chromosomes, so that the two daughter blastomeres retain the diploid number of chromosomes.

Detailed explanation-2: -Blastomere. Blastomeres are the daughter cells formed after cleavage in zygotes. During cleavage, no growth occurs in the resulting blastomeres, hence the total size and volume of the embryo remain unchanged.

Detailed explanation-3: -In biology, a blastomere is a type of cell produced by cell division (cleavage) of the zygote after fertilization; blastomeres are an essential part of blastula formation, and blastocyst formation in mammals.

Detailed explanation-4: -A zygote undergoes rapid cell divisions (cleavage) to form a spherical ball of cells: the blastula; this will further develop into a blastocyst.

Detailed explanation-5: -Cleavage and Blastula Stage After the cleavage has produced over 100 cells, the embryo is called a blastula. The blastula is usually a spherical layer of cells (the blastoderm) surrounding a fluid-filled or yolk-filled cavity (the blastocoel).