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meiosis

Line breaks: mei|osis
Pronunciation: /mʌɪˈəʊsɪs
 
/

Definition of meiosis in English:

noun (plural meioses /-siːz/)

[mass noun]
1 Biology A type of cell division that results in four daughter cells each with half the number of chromosomes of the parent cell, as in the production of gametes and plant spores: the sporophytes of green algae form spores only by meiosis [count noun]: no recombinants were observed in over 100 meioses Compare with mitosis.
More example sentences
  • In most meioses, every chromosome pair, no matter how small, sustains at least one crossover - a so-called obligate crossover or obligate chiasma.
  • They were able to work with 12 meioses (a three-generational family with four grandparents, two parents, and four children) and seven marker loci.
  • My personal hope is that students will have some intuitive understanding of meiosis as the physical basis of genetics.
2 another term for litotes.
Example sentences
  • Meiosis, often achieved through a trope of one word, may range from bitter scorn to light derision.

Origin

mid 16th century (in sense 2): modern Latin, from Greek meiōsis, from meioun 'lessen', from meiōn 'less'. sense 1 dates from the early 20th century.

Derivatives

meiotic

1
Pronunciation: /-ˈɒtɪk/
adjective
Example sentences
  • Males can, therefore, arise spontaneously, as a result of the rare meiotic loss of an X chromosome.
  • Subsequently, one of the two mating-type alleles was lost during mitotic or meiotic divisions.
  • Several models have been proposed to explain the mechanism responsible for meiotic recombination.

meiotically

2
Pronunciation: /-ˈɒtɪk(ə)li/
adverb
Example sentences
  • Systematic disruption of meiotically induced genes and analysis of the resulting sporulation phenotypes has uncovered many genes involved in various aspects of sporulation.
  • Following selection, haploids produce gametes mitotically and diploids produce gametes meiotically that then enter the random mating pool.
  • Triploids are often phenotypically normal plants but are meiotically unstable and therefore transient.

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