Meiosis meaning

mī-ōsĭs
Frequency:
(genetics) The process of cell division in sexually reproducing organisms that reduces the number of chromosomes from diploid to haploid, as in the production of gametes.
noun
3
0
Rhetorical understatement.
noun
2
0
The definition of meiosis is the process of cellular division.

An example of meiosis is when a chromosome reduces from a double cell to a single cell.

noun
0
0
The process of two consecutive nuclear divisions in the formation of germ cells in animals and of spores in most plants, by which the number of chromosomes ordinarily is reduced from the diploid, or double, number found in somatic cells to the haploid, or halved, number found in gametes and in spores.
noun
0
0
noun
0
0
Advertisement
(genetics) The process of cell division in sexually reproducing organisms that reduces the number of chromosomes from diploid to haploid, as in the production of gametes.
noun
0
0
The process in cell division in sexually reproducing organisms that reduces the number of chromosomes from diploid to haploid (half the original number). Meiosis involves two consecutive divisions of the nucleus and leads to the production of reproductive cells (gametes) in animals and to the formation of spores in plants, fungi, and most algae (the haploid spores grow into organisms that produce gametes by mitosis). Meiosis begins when the chromosomes, which have already duplicated, condense along the center of the nucleus, and pairs of homologous chromosomes undergo crossing over , whereby some of their genetic material is exchanged. The pairs of chromosomes then separate and move to opposite ends of the cell, and the cell itself divides into two cells. In the second stage, each of these two cells also divides into two cells. Meiosis thus produces four cells, each of which contain half the number of chromosomes as the original cell. Some or all of the four cells may become functional gametes or spores.
0
0
(countable, rhetoric) A figure of speech whereby something is made to seem smaller or less important than it actually is.
noun
0
0
(uncountable, cytology) Cell division of a diploid cell into four haploid cells, which develop to produce gametes.
noun
0
0

Origin of meiosis

  • Greek meiōsis diminution from meioun to diminish from meiōn less mei-2 in Indo-European roots

    From American Heritage Dictionary of the English Language, 5th Edition

  • Modern Latin, from Ancient Greek μείωσις (meiōsis, “a lessening"), from μειόω (meioō, “I lessen"), from μείων (meiōn, “less").

    From Wiktionary