Question

Meiosis involves
A.One nuclear division and one chromosome division
B.One nuclear division and two chromosome divisions
C.Two nuclear divisions and one chromosome division
D.Two nuclear divisions and two chromosome divisions

Answer 1

Hint: The DNA copying in the cell is repeated in Meiosis I, leading to formation of two matching complete sets of chromosomes. Two centrosomes are present outside the nucleus, each contains a pair of centrioles, and these frameworks are essential for the cell division process.

Complete answer:
Meiosis is a mechanism that results in four cells comprising half the original volume of genetic material are generated by a single cell that divides twice. These cells are present as our reproductive cells: males' sperm, females' eggs.

Now, let us find the solution from the options-
-As we know, meiosis is also known as a reduction division, in which the number of chromosomes from parent cell to daughter cell is reduced to half.
-This is composed of two cycles: Meiosis I and Meiosis II, in which nuclear and cell division occurs, but only after DNA replication occurs.
-The DNA replication of the parent material usually takes place during meiosis after the cell has concluded and thus similar sister chromatids are produced.

As we know it is a kind of reductional division, we realize that four daughter cells are produced with half the amount of parent cell chromosomes.
As seen beyond this, the pairing of non-homologous chromosomes is never involved in Meiosis and no recombination happens between them.

Hence, the correct answer is option (C)

Note: In Meiosis II, the chromosomes once again condense into recognizable X-shaped forms in each of the two daughter cells that can be clearly identified under a microscope. The membrane present in each daughter cell around the nucleus dissolves, freeing the chromosomes.