meiosis

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Related to meiotic division: mitosis, meiosis, Mitotic division
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meiosis
top to bottom:In meiosis a parent cell replicates and recombines, divides once to create two daughter cells, then divides again creating four daughter cells, each of which has half the genetic content of the original parent cell.

mei·o·sis

 (mī-ō′sĭs)
n. pl. mei·o·ses (-sēz′)
1. 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.
2. Rhetorical understatement.

[Greek meiōsis, diminution, from meioun, to diminish, from meiōn, less; see mei- in Indo-European roots.]

mei·ot′ic (-ŏt′ĭk) adj.
mei·ot′i·cal·ly adv.

meiosis

(maɪˈəʊsɪs)
n, pl -ses (-ˌsiːz)
1. (Biology) a type of cell division in which a nucleus divides into four daughter nuclei, each containing half the chromosome number of the parent nucleus: occurs in all sexually reproducing organisms in which haploid gametes or spores are produced. Compare mitosis See also prophase2
2. (Rhetoric) rhetoric another word for litotes
[C16: via New Latin from Greek: a lessening, from meioun to diminish, from meiōn less]
meiotic adj
meiˈotically adv

mei•o•sis

(maɪˈoʊ sɪs)

n.
1. part of the process of gamete formation in sexual reproduction consisting of chromosome conjugation and two cell divisions after which the chromosome number is reduced by half. Compare mitosis.
2. expressive understatement, esp. litotes.
[1580–90; < Greek meíōsis a lessening =meiō-, variant s. of meioûn to lessen (derivative of meíōn less) + -sis -sis]
mei•ot•ic (maɪˈɒt ɪk) adj.
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meiosis
In early prophase, chromosomes line up to form pairs, centrioles move toward opposite ends of the cell, and the membrane surrounding the nucleus disappears. In late prophase, the chromatids line up along the center of the cell. During metaphase, each member of a chromatid pair becomes attached to spindle fibers from opposite ends of the cell. In anaphase, the chromosomes from each chromatid pair separate and begin to move toward opposite ends of the cell. During telophase, the cell divides into two new daughter cells, each with half the original number of chromosomes. In second telophase, each of the two daughter cells from the first division divides again to produce a total of four daughter cells, each having just a single set of chromosomes.

mei·o·sis

(mī-ō′sĭs)
A type of cell division, occurring in two phases, that reduces the number of chromosomes in reproductive cells to half the original number. It results in the production of reproductive cells (called gametes) in animals and the formation of spores in plants, fungi, and most algae. The first phase of meiosis involves duplication and then separation of the chromosomes, followed by division into two daughter cells that each contain half the number of chromosomes as the original cell. In the second phase, each daughter cell divides to form an additional reproductive cell. See Note at mitosis.

meiosis

an expressive understatement, especially litotes. — meiotic, adj.
See also: Rhetoric and Rhetorical Devices
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.meiosis - (genetics) cell division that produces reproductive cells in sexually reproducing organismsmeiosis - (genetics) cell division that produces reproductive cells in sexually reproducing organisms; the nucleus divides into four nuclei each containing half the chromosome number (leading to gametes in animals and spores in plants)
genetic science, genetics - the branch of biology that studies heredity and variation in organisms
anaphase - the stage of meiosis or mitosis when chromosomes move toward opposite ends of the nuclear spindle
cell division, cellular division - the process in reproduction and growth by which a cell divides to form daughter cells
cytokinesis - organic process consisting of the division of the cytoplasm of a cell following karyokinesis bringing about the separation into two daughter cells
karyokinesis - organic process consisting of the division of the nucleus of a cell during mitosis or meiosis
metaphase - the second stage of meiosis
nondisjunction - meiosis in which there is a failure of paired homologous chromosomes to separate; results in an abnormal number of chromosomes in the daughter cells
prophase - the first stage of meiosis
segregation - (genetics) the separation of paired alleles during meiosis so that members of each pair of alleles appear in different gametes
telophase - the final stage of meiosis when the chromosomes move toward opposite ends of the nuclear spindle
2.meiosis - understatement for rhetorical effect (especially when expressing an affirmative by negating its contrary); "saying `I was not a little upset' when you mean `I was very upset' is an example of litotes"
understatement - a statement that is restrained in ironic contrast to what might have been said
rhetorical device - a use of language that creates a literary effect (but often without regard for literal significance)
Translations
meióza
Meiose
meioosi
meiózis
meiose

meiosis

[maɪˈəʊsɪs] N (meioses (pl)) [maɪˈəʊsiːz]
1. (Bio) → meiosis f
2. (= litotes) → lítote f

meiosis

n pl <-ses> (Biol) → Meiose f

meiosis

[maɪˈəʊsɪs] nmeiosi f

mei·o·sis

n. meiosis, proceso de subdivisión celular que resulta en la formación de gametos.
References in periodicals archive ?
When pollen grains become mature, the tapetal cells were degenerated, In meiotic division, the middle layers cells start a degeneration process.
With very low frequency, triploid gametes can be formed by dysfunction of the first meiotic division, resulting in tetraploid zygotes when crossed with diploid individuals.
Occasional irregular meiotic division, such as a chromosome bridge at anaphase II, and chromosomal fragments at metaphase I and telophase II were observed (Fig.
The arrest of spermatogenesis may probably occur as a consequence of reduction in serum testosterone which had been shown to be essential for the completion of meiotic division during spermatogenesis.
After determination of the genotypes of the trisomic children and their parents, there are 2 steps involved in determining the origin of nondisjunction (NDJ) that must be considered in sequence: (a) identifying the nondisjoining parent, and (b) identifying the meiotic division (meiosis I or II) in which the NDJ occurred.
The percentage of the oocytes that developed to the metaphase stage of the second meiotic division (M-II stage) in each group, sperm penetration, and embryonic development rates were subjected to arcsine transformation, and all data were analyzed with ANOVA followed by Duncan's Multiple Range Test.
This latter cell gives rise to the primary spermatocyte, which quickly undergoes its first meiotic division and passes through 4 prophase stages, leptotene, zygotene, pachytene, and diplotene, before undergoing meiotic metaphase.
Autosomal aneuploidies in offspring are primarily due to chromosomal segregation errors during the first meiotic division of oogenesis, with only a minor paternal contribution (Hassold et al.
Mammalian spermatogenesis occurs continuously with individual maturation of sperm through meiotic division of spermatocytes.
Additionally, photographs of babies and preschool children with Down syndrome, and charts explaining such things as meiotic division in chromosomes and developmental milestones, are presented in an informative and appealing manner.