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What is Meiosis?
Meiosis is a kind of cell division which produces four little girl cells. Every one of these cells comprises of a large portion of the quantity of chromosomes present in the parent cell, as in the creation of gametes and plant spores.
Diplontic life cycle.
A. Meiosis I:
Here, the sets of homologous chromosomes are isolated and an exceptional cell division happens diminishing the cell from diploid to haploid.
Meiosis I is additionally partitioned into the accompanying stages,
- Prophase I
- Prometaphase I
- Metaphase I
- Anaphase I
- TelophaseI
- Prophase I:
In Prophase I homologous chromosomes pair and trade DNA and recombinant chromosomes are framed.
Five Phases of Prophase I:
- Leptotene
- Zygotene
- Pachytene
- Diplotene
- Diakinesis
Haplontic life cycle
- Prometaphase I:
In prometaphase I development of shaft device happens and chromosomes are connected to axle strands by kinetochores.
- Metaphase I:
Here, the homologous sets of chromosomes are orchestrated in a twofold line along the metaphase plate. These chromosomes are arbitrarily organized along the metaphase plate.
- Anaphase I:
In this stage partition of pair of homologous chromosomes happen and they move to the furthest edges of the cell.
- Telophase I:
In the last phase of meiosis I, chromosomes become diffuse and reconstruction of atomic layer happens.
- Cytokinesis:
Here, cells are at long last separated to shape two new cells, trailed by Meiosis II. The Haploid cells (recently shaped) comprise of one duplicate of every chromosome.
B. Meiosis II:
Two chromatids are shaped by isolating every chromosome in Meiosis II.
Note: Meiosis produces Genetic assorted variety.
