In spec. uses. Biology (a) A group of four cells, e.g. spores, pollen-grains. (b) A group of four chromosomes formed by the division of a single…
单词 | θ19135 |
释义 | the world > life > biology > biological processes > genetic activity > genetic components > [noun] > chromosome > group of chromosomes (4) tetrad1876 In spec. uses. Biology (a) A group of four cells, e.g. spores, pollen-grains. (b) A group of four chromosomes formed by the division of a single… ring chromosome1895 (a) a circular chromosome or pair (or larger group) of chromosomes found as part of the normal karyotype of an organism or developing gamete; (b)… genome1926 Originally: a complete haploid set of chromosomes (of an organism, species, or gamete). Later also: the complete set of genes of an organism… ring1949 Cell Biology. A chromosome, group of chromosomes, or part of a chromosome in the form of a loop without free ends. Cf. ring chromosome n. at… |
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