During anaphase $I$ of meiosis
- homologous chromosomes separate
- non-homologous chromosomes separate
- sister chromatids chromosomes separate
- non-sister chromatids chromosomes separate
The Correct Option is A
Solution and Explanation
Two chromatids of a chromosome travel as a unit (dyad) from each tetrad to one spindle pole during anaphase I, whereas the other two chromatids of its homologous chromosome move to the other pole. As a result, rather than splitting up chromatids, each pair of homologous chromosomes does so. As a result, each pole receives half of the chromosomes that are visible in early prophase. The actual reduction in the number of chromosomes takes place during this stage of the anaphase I.
Meiosis is a term used to describe the process of two nucleus fissions that occurs during the division of germ cells. Meiosis 1 and Meiosis 2, the two nuclear fissions, result in the production of four gametes, which are sex cells. Each sex cell has half as many chromosomes as its parent cell. When a cell divides into four haploid daughter cells during reproduction, this type of cell division takes place. It divides into four daughter cells, each of which has a nucleus. A distinct pair of chromosomes and half of the genetic material from the parent cell are present in each produced cell. Meiosis has a role in two critical stages of the sexual life cycle in eukaryotes. The change from a diploid to a haploid state is represented by the first, and the line of new allele combinations is represented by the second. Meiosis only takes place in the germline.
Anaphase I
Similar to anaphase in mitosis, the chromosomes are currently being pushed towards the centrioles on each side of the cell. However, sister chromatid centrosomes do not separate during meiotic anaphase I, suggesting that only homologous chromosomes and not sister chromatids are divided.
Top Questions on cell cycle and cell division
- Choose the correct statements among the following:
1. Duplication of genome, synthesis of other cell constituents, and division to produce new cells is called cell cycle.
2. Interphase is followed by a resting phase.
3. In every cell division, genetic variability will increase from generation to generation.
4. Plant cells can divide mitotically in both haploid and diploid cells.
Identify the correct option from the following:- AP EAPCET - 2025
- Botany
- cell cycle and cell division
- Arrange the following events that occur during prophase-I of Meiosis - I
A) Formation of synaptonemal complex
B) Repulsion between Homologous chromosomes
C) Formation of Bivalents
D) Exchange of Genetic material between non-sister chromatids of Homologous chromosomes
E) Terminalization
The correct sequence is
Options :- AP EAPCET - 2025
- Botany
- cell cycle and cell division
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- MHT CET - 2025
- Biology
- cell cycle and cell division
- What is the primary function of the mitochondria in eukaryotic cells?
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- Biology
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- Which of the following pair of cells are haploid?
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- Biology
- cell cycle and cell division
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