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单词 maturation division
释义

maturation division


maturation division

n. Either of the two successive cell divisions of meiosis, with only one duplication of the chromosomes, that results in the formation of haploid gametes.

Maturation Division


Maturation Division

 

two successive indirect divisions of developing sex cells in animals and plants that reproduce sexually. As a result of maturation division, the number of chromosomes (characteristic of somatic cells) is reduced to one half the original number in the nuclei of sex cells. Maturation division in male sex cells precedes the formation of mature spermatozoa. In female sex cells it halts at different stages, depending on the type of organism, and is usually completed in the fertilization period after the egg has been activated.

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更新时间:2024/12/23 14:38:54