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
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