Question

what's the mean of cleavage?different types of cleavage and state factor responsibity for these​?

Answer 1

Answer:

In embryology, cleavage is the division of cells in the early embryo. The process follows fertilization, with the transfer being triggered by the activation of a cyclin-dependent kinase complex. The zygotes of many species undergo rapid cell cycles with no significant overall growth, producing a cluster of cells the same size as the original zygote. The different cells derived from cleavage are called blastomeres and form a compact mass called the morula. Cleavage ends with the formation of the blastula.

different types of cleavages:

1.determinate

2.indeterminate

3.holoblastic

4.bi lateral

5.radial

6.rotational

7.spiral

8.meroblastic

Depending mostly on the amount of yolk in the egg, the cleavage can be holoblastic (total or entire cleavage) or meroblastic (partial cleavage). The pole of the egg with the highest concentration of yolk is referred to as the vegetal pole while the opposite is referred to as the animal pole.

Cleavage differs from other forms of cell division in that it increases the number of cells and nuclear mass without increasing the cytoplasmic mass. This means that with each successive subdivision, there is roughly half the cytoplasm in each daughter cell than before that division, and thus the ratio of nuclear to cytoplasmic material increases.

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Answer 2

CLEAVAGE

Cleavage refers to the early cell divisions that occur as a fertilized egg begins to develop into an embryo.

Types of cleavage

Determinate.

Indeterminate.

Holoblastic.

Meroblastic.