| 单词 |
assortative |
| 释义 |
assortative, a.|əˈsɔːtətɪv|
[f. assort v. + -ative.]
That assorts; assortative mating, non-random mating, mating on the basis of the possession by the partners of similar characteristics, circumstances, etc.
1897K. Pearson in Phil. Trans. R. Soc. 1896 A. CLXXXVII. 258 Preference of individuals with an organ or characteristic of given size for mates with the same or another organ or characteristic of a size, the average of which differs from the..population average. This type of sexual selection which may be spoken of as assortative mating is measured mathematically by the coefficient of correlation between the two organs or characteristics in mated pairs. 1902Encycl. Brit. XXXIII. 637/1 Assortative mating exists when individuals which mate are not paired at random, but a definite correlation is established between the characters of one mate and those of the other. 1955New Biol. XVIII. 37 In a few animal species negative assortative mating, that is to say a tendency of like to mate with unlike, has been observed. Positive assortative mating occurs in flowering plants which are fertilized by insects. |
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单词 assortedness 释义 assortedness[f. prec. + -ness.]The condition of being (well or ill)......