| 单词 | sex chromosome |
| 释义 | > as lemmassex chromosome sex chromosome n. Biology each of the chromosomes (normally two in number) in a cell's chromosomal complement, the particular combination of which normally determines an individual's sex; contrasted with autosome n.In humans and other mammals, normal females have two X chromosomes, males one X and one Y. In birds and some other animals, males have two Z chromosomes, females one Z and one W. ΘΚΠ the world > life > biology > biological processes > genetic activity > genetic components > [noun] > chromosome > types of chromosome chromoplastid1885 accessory chromosome1899 chromoplast1902 X1902 heterochromosome1904 idiochromosome1905 macrochromosome1905 allosome1906 autosome1906 monosome1906 sex chromosome1906 supernumerary1907 X chromosome1911 Y chromosome1911 univalent1912 euchromosome1914 W1917 monosome1921 tetrasome1921 trisome1921 heterosome1938 isochromosome1939 trisomic1939 metacentric1945 acrocentric1949 polycentric1953 Philadelphia chromosome1961 monocentric1979 1906 E. B. Wilson in Jrnl. Exper. Zool. 3 28 These chromosomes are the bearers of the male and female qualities (or the factors essential to the production of these qualities) respectively. They may also be designated (whenever it is desirable to avoid circumlocution) as sex-chromosomes. 1926 J. S. Huxley Ess. Pop. Sci. 46 From all the facts, we can, I think, be sure that all the higher animals possess special X or sex-chromosomes, two in one sex, one in the other, by whose agency sex is determined. 1974 U. Goodenough & R. P. Levine Genetics x. 466 The sex of a fly is determined, in part, by the number of euchromatic sex chromosomes, called X chromosomes, possessed by an individual. 2002 J. Eugenides Middlesex iv. 411 The webbed-necked girl teens with Turner's syndrome, who had only one sex chromosome, a lonely X. < as lemmas |
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