1. Meiosis Cell division occurs when physiological changes occur in the body of an organism.
2. Meiosis occurs in cell division for reproduction.
3. When organelle growth is completed, meiosis induces division.
4. Meiosis occurs when an organism matures.
5. This division occurs when the balance of nucleic acids and hormones is disturbed.
6. Meiosis occurs when there is more RNA than DNA in the cell.

1. Meiosis Cell division occurs in the mother cell of an organism.
2. It occurs only in diploid and polyploid cells.
3. In this process, four offspring cells (haploid) are formed from each reproductive mother cell (diploid).
4. In this process the nucleus of the cell divides twice and the chromosomes divide once.
5. In this process, the chromosome number of the offspring cells is half of the chromosome number of the mother cell.
6. Distinct arrangement of chromosomes occurs in meiosis.
7. In this process the prophase stage is prolonged and in this stage objects called chromomeres are formed.
8. Prophase-1 is preceded by replication of DNA. Prophase-1 is most significant.
9. Synapsis and bivalents occur between homologous chromosomes in this process.
10. In the process of meiosis, chiasma and crossing over occur between non-sister chromatids. New features appear.
11. Meiosis cell division produces sperms and eggs and plays an important role in sexual reproduction.
12. Meiosis-II is followed by cytokinesis.
13. Due to crossing over and unique arrangement of chromosomes, the resulting cells are never identical to the mother cell.
14. Meiosis in polyploid plants is very complex in nature.
15. Meiosis plays a role in variation and biodiversity.
16. Meiosis Cell division drives evolution in organisms.

Meiosis occurs in cells with diploid chromosomes. Meiosis occurs in the mother cell of higher organisms. Meiosis occurs in the zygote after fertilization in lower organisms. Meiosis does not occur in bacteria.

In 1876, the present scientist Gangpadhat Aiwathar Riham was the first to observe the division of myocyte cells in the ovary. In 1883, Bonedeni and Hauser discovered the number of chromosomes in haploids in the worm genome. In 1887, the scientist Dobrangsdahah was the first to describe the reduction process in chromosomes. In 1887, Irawatu was the first to observe meiotic cell division in the roundworm genitalia. In 1888, the scientist Jhathdhangnanthmavat first observed the reductive division of chromosomes in the reproductive mother cell of a flowering plant. In 1905, Vajnyani Ridhatsavat and Gardtava named the first Myosci. In 1911, he was the first to prove crossover and genetic rearrangement in Drosophila.

The word Meiosis is formed from the Greek words meious meaning to reduce and osis meaning state. In that process the actual cells
The nucleus and cytoplasm divide to form four daughter cells and the chromosome number of the daughter cell is half the number of chromosomes of the mother cell is called meiosis. It is also called reductive or reductional division. The word Miosis is spelled Meiosis based on the Greek root word meioum.

Telophase-1 is the last stage of meiosis-1. Chromosomes are fixed at opposite poles. Chromosome water addition or water absorption (hydration) begins. Chromosomes decrease in capacity to hold dyes. Chromosomes uncoil and become long, narrow and fuzzy. The nuclear membrane and nucleolus appear. As a result, two nuclei are formed at both ends. Cytokinesis occurs at the telophase-1 stage in many species. That is, in the equatorial region of the cell, the cell plate is formed and turns into two daughter cells. A child cell has h number of chromosomes. Telophase-1 does not occur in many species. Siddique Publications

In anaphase-1, homologous chromosomes separate. Chromosomes run in opposite poles. Polar movement of chromosomes occurs due to contraction of chromosome bases and elongation of stem bodies. This is called anaphagic movement. During polar movement, the centromere is the leader and the armature is the follower. When the chromosomes reach the poles, they look like the letters V, L, J or I. As undivided complete chromosomes of bivalents reach the poles, the chromosome number becomes half of the chromosome number of the maternal cell. Siddique Publications

In metaphase-1, the chromosomes become thicker and shorter. Each centromere of a bivalent is poleward, equidistant from the equator. Centromeres are associated with traction fibers. Loops are formed between chromosomes. Towards the end of this stage, the bivalent chromosomes separate under the pull of traction fibers.

Dia means opposite and kinesis means insertion. At this stage the chromosomes are shorter and thicker. The maximum marginalization of kiazmata occurs. Chromatids cannot be identified separately due to the accumulation of matrix on each chromosome in bivalents. Bivalents move from the center of the nucleus to the periphery. At this point the exchanged part is visible through the crossover. Towards the end of this stage, the nucleolus disappears and the nuclear envelope is removed.