The process of dividing the preexisting cell into two or more daughter cells is called cell division.
The process of cell division in which a diploid mother cell will divide into two identical daughter cells is called mitosis cell division. In this division, thenumber of chromosome in mother cell and daughter cells is same.
The process of cell division in which a diploid mother cell will divide into four haploid daughter cells is called meiosis cell division. In this division, the chromosome number is reduced to half in the daughter cells.
|Mitosis cell division||Meiosis cell division|
|One diploid mother cell divides into two diploid daughter cells||One diploid mother cell divides into four haploid daughter cells.|
|It is an equational cell division.||It is a reductional cell division.|
|It generally occurs in somatic cells.||It only occurs in reproductive cells.|
|It helps for physical growth.||It supports reproduction.|
|This type of division starts immediately after formation of zygote.||This type of cell division starts only after an individual becomes sexually mature.|
|It is a form of asexual reproduction.||It is a form of sexual reproduction.|
The amitosis (also called direct cell division) is the means of asexual reproduction in acellular organisms like bacteria and protozoans and also a method of multiplication or growth in foetal membranes of some vertebrates. In amitosis type of cell division, the splitting of a nucleus is followed by cytoplasmic constriction.
During amitosis, the nucleus elongates first and then assumes dumbbell- shaped appearance. The depression or constriction increases in size and ultimately divides the nucleus into two nuclei; the division of nucleus is followed by the constriction of cytoplasm which divides the cell into two equal or approximately similar halves.
Therefore, without the occurrence of any nuclear event, two daughter cells are formed.
Mitotic cell division
Meiotic cell division
i. It takes place in all somatic cells.
ii. One mother cell produces two daughter cells.
iii. Daughter cells are identical to each other and to the mother cell.
iv. The daughter cells are diploid (2n)
v. The daughter cells can survive independently.
i. It takes place in germinal cells.
ii. One mother cell produces four daughter cells.
iii. Due to crossing over daughter cells vary among each other.
iv. The daughter cells are haploid (n).
v. The daughter cells cannot survive independently.
Anaphase of mitosis
Anaphase of meiosis
i. The chromatids are separated and move towards the opposite poles after the division of centromere.
ii. Chromosomes are similar.
i. The chromatids move towards the opposite poles without the division of centromere.
ii. Chromosomes are dissimilar.
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