alleryStart learning →Codominance is defined as which of the following?
ABoth alleles are expressed at once in the heterozygote
BOne allele is silenced by an allele of a separate gene
CThree or more alleles exist for one gene in a population
DThe heterozygote shows a phenotype between the parents
Answer & Solution
Correct answer: A. Both alleles are expressed at once in the heterozygote
1. Codominance is a variation on incomplete dominance.
2. In codominance both alleles for the same characteristic are expressed simultaneously in the heterozygote.
3. An intermediate blend instead of both products is incomplete dominance.
4. Masking by a separate gene is epistasis, and several alleles in a population is multiple allelism.
_Source: OpenStax Biology (1st ed., CC BY 4.0), Ch 12 "Mendel's Experiments and Heredity", section 12.2 Characteristics and Traits_
Keep practising Mendel's Experiments and Heredity
Browse all Mendel's Experiments and Heredity questions for NCEA Level 2, or explore more Biology topics.
Related questions
Sort each clue by its dominance patternOrder the steps of crossing overKnock out the false allele claimsHow many genes contribute to eye colour in humans, at minimum?A single characteristic gives a phenotypic ratio whose parts total 16. What does that usuaIn shepherd's purse, seeds are ovoid only when both genes are homozygous recessive. What rTwo mice heterozygous at both the A and C genes are crossed. What phenotypic ratio of agouAgouti coat colour needs a dominant A allele, but pigment of any kind needs a dominant C a