Question

Which of the following conditions represent a case of co-dominant genes?

• A. Each allele produces an independent effect in heterozygous condition
• B. Genes that are similar in phenotypic effect when present separately, but when together interact to produce a different trait
• C. An allele expresses itself, suppressing the phenotypic effect of its allele
• D. Both alleles interact to produce a trait, which resembles only one of the parental types

Answer 1

The correct option is A Each allele produces an independent effect in heterozygous condition

The inheritance in which distinct expression of both the alleles occurs in heterozygous condition and each allele produces an independent effect irrespective of the other is called codominance.
Genes which are similar in phenotypic effect when present separately, but when together interact to produce a different trait, are called complementary genes.
The phenomenon in which an allele expresses itself, suppressing the phenotypic effect of it allele is dominance.