codominancen.

Brit.

/ˌkəʊˈdɒmᵻnəns/, U.S.

/ˌkoʊˈdɑmənəns/

Origin: Formed within English, by derivation. Etymons: co- prefix, dominance n.

Etymology: < co- prefix + dominance n., after codominant adj.

a. Forestry. In forest trees: the condition of having crowns that reach but do not extend above the average level of the canopy. Cf. codominant adj. 1a.

ΚΠ

1911 H. N. Whitford Forests of Philippines: Pt. I (Philippine Bureau of Forestry Bull. No. 10) 20 The species which reach codominance with the dipterocarps are much less abundant than in other types in which the Dipterocarpaceæ predominate.

1957 W. R. Day Sitka Spruce in Brit. Columbia 99/2 Here is to be found the main reason for the co-dominance in height growth of spruce and cedar, and the sub-dominant position of hemlock, though this last-named was the most numerous species present.

2010 D. H. Peter & C. A. Harrington Reconstr. Old-growth Forest Stand Struct. Summary The stand at Fresca may have developed from initial codominance of red alder..and Douglas-fir.

b. Ecology. The sharing of dominance by two or more species of plant in a plant community. Cf. codominant adj. 1b.

ΚΠ

1912 Jrnl. Proc. Linn. Soc.: Bot. 1911–12 40 361 When the light is not more than 0.05 Spiræa is solely dominant, and all stages can be found between this and the co-dominance of the species, which occurs at about 0.2 light-intensity.

1974 Geography 59 246 The..defining characteristic [of tropical savanna] is the co-dominance of trees and grasses in varying proportions to form open, ‘park-like’ landscapes.

2013 R. M. Buttenschøn & J. Buttenschøn in I. D. Rotheram Trees, Forested Landscapes & Grazing Animals xxii. 327 In the grazed vegetation, dominance is often suppressed and a situation of co-dominance of a number of species prevails.

2. Genetics. The full and equal expression in the phenotype of both alleles present at a heterozygotic locus; (of alleles) fully and equally expressed when occurring together at a heterozygotic locus.

ΚΠ

1954 Biol. Bull. 107 293 Codominance, complementarity, indicates that the two mutations have affected different elements, O and S, each change being recessive to its wild-type alternative in the other allele.

1993 C. E. Purdom Genetics & Fish Breeding vi. 89 The co-dominance of different alleles ensures that the pattern of bands, the phenotype, fully reflects the genotype.

2008 D. Alford & J. Hill Excel HSC Biol. ii. 38/2 Co-dominance does not produce simple Mendelian ratios.

This entry has been updated (OED Third Edition, September 2020; most recently modified version published online March 2022).

单词	codominance
释义	codominancen. Brit. /ˌkəʊˈdɒmᵻnəns/, U.S. /ˌkoʊˈdɑmənəns/ Origin: Formed within English, by derivation. Etymons: co- prefix, dominance n. Etymology: < co- prefix + dominance n., after codominant adj. 1. a. Forestry. In forest trees: the condition of having crowns that reach but do not extend above the average level of the canopy. Cf. codominant adj. 1a. ΚΠ 1911 H. N. Whitford Forests of Philippines: Pt. I (Philippine Bureau of Forestry Bull. No. 10) 20 The species which reach codominance with the dipterocarps are much less abundant than in other types in which the Dipterocarpaceæ predominate. 1957 W. R. Day Sitka Spruce in Brit. Columbia 99/2 Here is to be found the main reason for the co-dominance in height growth of spruce and cedar, and the sub-dominant position of hemlock, though this last-named was the most numerous species present. 2010 D. H. Peter & C. A. Harrington Reconstr. Old-growth Forest Stand Struct. Summary The stand at Fresca may have developed from initial codominance of red alder..and Douglas-fir. b. Ecology. The sharing of dominance by two or more species of plant in a plant community. Cf. codominant adj. 1b. ΚΠ 1912 Jrnl. Proc. Linn. Soc.: Bot. 1911–12 40 361 When the light is not more than 0.05 Spiræa is solely dominant, and all stages can be found between this and the co-dominance of the species, which occurs at about 0.2 light-intensity. 1974 Geography 59 246 The..defining characteristic [of tropical savanna] is the co-dominance of trees and grasses in varying proportions to form open, ‘park-like’ landscapes. 2013 R. M. Buttenschøn & J. Buttenschøn in I. D. Rotheram Trees, Forested Landscapes & Grazing Animals xxii. 327 In the grazed vegetation, dominance is often suppressed and a situation of co-dominance of a number of species prevails. 2. Genetics. The full and equal expression in the phenotype of both alleles present at a heterozygotic locus; (of alleles) fully and equally expressed when occurring together at a heterozygotic locus. ΚΠ 1954 Biol. Bull. 107 293 Codominance, complementarity, indicates that the two mutations have affected different elements, O and S, each change being recessive to its wild-type alternative in the other allele. 1993 C. E. Purdom Genetics & Fish Breeding vi. 89 The co-dominance of different alleles ensures that the pattern of bands, the phenotype, fully reflects the genotype. 2008 D. Alford & J. Hill Excel HSC Biol. ii. 38/2 Co-dominance does not produce simple Mendelian ratios. This entry has been updated (OED Third Edition, September 2020; most recently modified version published online March 2022). < n.1911
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