Question:

Meiosis occurs in organisms during

Updated On: Jul 6, 2022

sexual reproduction
vegetative reproduction
both sexual and vegetative reproduction
none of these

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The Correct Option is A

Solution and Explanation

The production of offspring by sexual reproduction includes the fusion of two gametes, each with a complete haploid set of chromosomes. For this, gametes are formed from specialised diploid cells which undergo meiosis that reduces the chromosome number by half resulting in the production of haploid daughter cells.

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Notes on Meiosis

Concepts Used:

Meiosis

Meiosis is a process in which a single cell, a diploid cell, undergoes division twice to produce four haploid daughter cells, and the cells produced are known as the sex cells or gametes (sperms in males and egg in females). It contains half of the original amount of genetic information. The haploids only have half the number of chromosomes of the parent cell.

Features of Meiosis:

It results in the formation of four daughter cells in each cycle of cell division.
The daughter cells are identical to the mother cell in shape and size but different in chromosome number.
The daughter cells are haploid.
Recombination and segregation take place in meiosis.
The process occurs in the reproductive organs and results in the formation of gametes.
The process is divided into two types-Meiosis-I reduces the chromosome number to half and is known as reductional division. Meiosis-II is just like the mitotic division.

Phases of Meiosis

Meiosis can be divided into nine stages. The process is usually divided into two parts. The first time a cell divides (meiosis I) and the second time it divides (meiosis II). The phases are as follows –

Meiosis 1 Stages

The different stages of meiosis 1 can be explained by the following phases :

Prophase 1
Metaphase 1
Anaphase 1
Telophase 1

Meiosis 2 Stages