Question:

In meiosis chromosome number becomes

Updated On: Jul 28, 2022
  • half of as parernt chromosome
  • same as that of parent chromosome
  • one fourth of its parent chromosome
  • none of the above
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The Correct Option is A

Solution and Explanation

Meiosis is the type of cell division in which a parent cell gives rise to four daughter cells, which are having half the chromosome number as compared to the parent cell. The process by which reduction in chromosome number takes place is called reduction division or first meiotic division or heterotypic division. $\underset{\text{diploid}}{\text{Parent cell}(2n)} {->[\text{Meiosis} I]} \underset{\text{haploid}}{2 \,\text {cells}(n)}$ The second meiotic division is the homotypic or equational division. $2$ cell $(n) {->[\text{Meiosis} II]} \underset{\text{haploid}}{4 \,\text {cells}(n)}$ Ultimately four daughter cells are produced that have half the chromosome number of their parents.
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Concepts Used:

Cell Cycle and Cell Division

Cell Cycle:

The sequence of events by which a cell copies itself synthesizes other constituents of the cell and eventually splits into two daughter cells is termed the cell cycle. The cell synthesizes all its constituents in a sequential pattern to make sure the proper division and distribution of components that occurs between the two daughter cells. Therefore, we can say that the cell cycle is the period of time between the development of new daughter cells and their further division.

Stages of Cell Cycle:

The cell cycle can be sub-divided into an additional category of Interphase. Meanwhile, the Interphase can be branched into 3 further stages, such as:

  1. G1 Phase - “Gap 1 Phase”
  2. S Phase - "Synthesis Phase"
  3. G2 Phase - "Gap 2 Phase"

Read More: Cell Cycle and Cell Division

Cell Division:

The division of the parent cells into two or more cells is called daughter cell, cell division takes place. In general, it occurs as a part of a larger cell cycle. All the cell reproduces by dividing into two, wherein each parental cell produces two daughter cells.

Stages of Cell Division:

Cell division can be widely divided into several sub-segments that result from Mitosis and Meiosis.

  1. Mitosis or (M Phase)
  2. Meiosis