Definition of Meiosis
“Meiosis is the type of cell division that results in four daughter cells each with half the number of chromosomes of the parent cell.”
What is Meiosis?
Meiosis is the process in which a single cell divides twice to form four haploid daughter cells. These cells are the gametes – sperms in males and egg in females. The process of meiosis is divided into 2 stages. Each stage is subdivided into several phases.
- Prophase I
- Metaphase I
- Anaphase I
- Telophase I
- Cytokinesis I
- Prophase II
- Metaphase II
- Anaphase II
- Telophase II
- Cytokinesis II
Read on to explore what is meiosis and meiosis cell division along with the different meiosis stages in detail.
Also Read: Mitosis
Stages of Meiosis
Meiosis cell division takes place in the following stages:
- The nuclear envelope disintegrates.
- Chromosomes begin to condense.
- Spindle fibres appear.
Spindle fibres attach to the chromosomes at the centromere.
The homologous chromosomes align at the equatorial plate ensuring genetic diversity among offspring.
The homologous chromosomes are pulled towards the opposite poles.
- Spindle fibres disappear.
- Nuclear envelope is reformed.
The cytoplasm and the cell divides resulting in 2 non-identical diploid daughter cells.
- The chromatin condenses into chromosomes.
- Nuclear envelope disintegrates.
- Centrosomes migrate to either poles.
- Spindle fibres are reformed.
The chromosomes align along the equatorial plate. On the contrary, the chromosomes in metaphase I were in homologous pairs.
Sister chromatids are pulled to the opposite poles.
Nuclear envelope redevelops and the spindle fibres disappear.
The cytoplasm and cell divides producing 4 non-identical haploid daughter cells.
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