Question

Significant of meiosis and mitosis and structure

Answer 1

In meiosis, DNA replication is followed by two rounds of cell division to produce four daughter cells, each with half the number of chromosomes as the original parent cell. ... During Meiosis II, the cohesion between sister chromatids is released and they segregate from one another, as duringmitosis.

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Answer 2

Answer:

• Mitosis ensures that the daughter cells inherit the same number of chromosomes. Hence, the chromosomes which carry hereditary information in the form of genes pass unaltered from one generation to another.

• Dead cells are replaced by newly formed cells through mitosis. Thus, it helps in the healing and repair of cells. eg. Blood cells, cells of skin surface.

• It helps to maintain equilibrium in the amount of DNA and RNA contents of a cell and also the nuclear and cytoplasmic balance in the cell.

• In unicellular organisms, mitosis helps in asexual reproduction.