| 释义 |
overdominanceenUK
o·ver·dom·i·nance O0180200 (ō′vər-dŏm′ə-nəns)n. The condition of a heterozygote having a phenotype that is more pronounced or better adapted than that of either homozygote.
o′ver·dom′i·nant adj.overdominance (ˌəʊvəˈdɒmɪnəns) nexcessive dominance
overdominanceenUK
overdominance[¦ō·vər′däm·ə·nəns] (genetics) Monohybrid heterosis, that is, the phenotype is being more pronounced in the heterozygote than in either homozygote with respect to a specified pair of alleles. overdominanceenUK
o·ver·dom·i·nance (ō'vĕr-dom'i-năns), That state in which the heterozygote has greater phenotype value and perhaps is more fit than the homozygous state for either of the alleles that it comprises. Compare: balanced polymorphism. overdominance (ō′vər-dŏm′ə-nəns)n. The condition of a heterozygote having a phenotype that is more pronounced or better adapted than that of either homozygote.
o′ver·dom′i·nant adj.o·ver·dom·i·nance (ō'vĕr-dom'i-năns) That state in which the heterozygote has greater phenotype value and perhaps is more fit than the homozygous state for either of the alleles that it comprises.
Compare: balanced polymorphismoverdominance a phenotypic condition in which the HETEROZYGOTE expresses a stronger manifestation of the trait than either HOMOZYGOTE. Overdominance produces heterozygous advantage that can maintain a GENETIC POLYMORPHISM in a population. |