Question
Wed February 08, 2012 By:
 

what is the difference between meiosis and mitosis? which process takes place when and in which cell?

Expert Reply
Thu February 09, 2012

 

Mitosis

Meiosis

Mitosis takes place within somatic cells.

Meiosis takes place within gamete cells (sex cells).

One single division of the mother cell results in two daughter cells.

Two divisions of the mother cell result in four meiotic products or haploid gametes.

The number of chromosomes per nucleus remains the same after division.

The meiotic products contain a haploid (n) number of chromosomes in contrast to the (2n) number of chromosomes in mother cell.

In mitosis, there is no pairing of homologous chromosomes.

During prophase I, complete pairing of all homologous chromosomes takes place.

There is no exchange of DNA (crossing-over) between chromosomes.

There is at least one crossing-over or DNA exchange per homologous pair of chromosomes.

The centromeres split during anaphase.

The centromeres separate during anaphase II, but not during anaphase I.

The genotype of the daughter cells is identical to that of the mother cells.

Meiotic products differ in their genotype from the mother cell.

After mitosis, each daughter cell has exactly same DNA strands.

After meiosis, each daughter cell has only half of the DNA strands

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