Which of the following stages of meiosis involves division of centromere?
Which of the following stages of meiosis involves division of centromere?
Metaphase II
Anaphase II
Telophase
Metaphase I
The Correct Option is B
Solution and Explanation
In meiosis, the division of centromeres occurs specifically during the stage known as Anaphase II. Meiosis is a two-part cell division process in sexually reproducing organisms that result in four daughter cells, each with half the number of chromosomes of the parent cell. It consists of two sequential phases: Meiosis I and Meiosis II.
Here are the relevant stages:
- Metaphase I: Homologous chromosomes align at the equatorial plate, but centromeres do not divide.
- Metaphase II: This stage sees the chromosomes aligning at the equatorial plate again, now consisting of chromatids held together by centromeres.
- Anaphase II: This is where the centromeres divide, and sister chromatids are separated and pulled towards opposite poles.
- Telophase: This is the final stage in both meiosis I and II, resulting in the formation of daughter nuclei, but it does not involve the division of centromeres.
The correct answer is Anaphase II because it specifically involves the division of centromeres, leading to the separation of sister chromatids into individual chromosomes.
Top Questions on cell cycle and cell division
- Choose the correct statements among the following:
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2. Interphase is followed by a resting phase.
3. In every cell division, genetic variability will increase from generation to generation.
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A) Formation of synaptonemal complex
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C) Formation of Bivalents
D) Exchange of Genetic material between non-sister chromatids of Homologous chromosomes
E) Terminalization
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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:
- G1 Phase - “Gap 1 Phase”
- S Phase - "Synthesis Phase"
- 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.
- Mitosis or (M Phase)
- Meiosis