Biology, asked by riyasaroha9004, 11 months ago

When cleavage gurrow bisects both the poles passing through centre of the egg and median axix runs between centres of animals pole ans vegetal pole it s called?

Answers

Answered by luk3004
0

Definition : The term cleavage refers to a series of rapid mitotic division of the zygote following fertilization, forming a many celled blastula. The cleavage follows fertilization and ends with the formation of a characteristic development stage called blastula.

Cleavage versus typical mitosis : The cleavage division are no doubt mitotic as they produce diploid cells, they differ from typical mitosis in a couple of significant points.

 

Different between cleavage and mitosis

S.No.

Characters

Cleavage

Normal mitosis

1.

Site of occurrence

In zygote  or parthenogenetic egg

In most of somatic cells

2.

Interphase

Of shorter period

Of longer period

3.

Growth

Does not occur

Occurs during interphase

4.

Oxygen consumption

High as is very rapid process

Low as is slow process

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