| 单词 | polar body |
| 释义 | > as lemmaspolar body polar body n. Cell Biology each of the smaller cells resulting from the asymmetric division of an oocyte at the two meiotic divisions during gametogenesis, which break down and have no further genetic role. ΘΚΠ the world > life > biology > biological processes > procreation or reproduction > reproductive substances or cells > [noun] > ovum or ootid > polar body polar body1882 polocyte1915 1882 Amer. Naturalist 16 654 In the female cell this is done by the process of budding, the result being the protrusion of one or more buds known as the polar bodies. 1927 J. B. S. Haldane & J. S. Huxley Animal Biol. ii. 60 In order to retain the large size of the egg, three of every four gametes produced are minute and non-functional, and are called polar bodies, while only one becomes a functional ovum. 1993 World & I Mar. 200/1 Yet another technique on the horizon, called polar body removal, may reveal the genetic makeup of an egg before it is fertilized. < as lemmas |
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