Question

A gene is said to be dominant if:

• A. It expresses its effect only in homozygous stage
• B. It is expressed only in heterozygous condition
• C. It is expressed both in homozygous and in heterozygous condition
• D. It is never expressed in any condition

Answer 1

The correct option is C It is expressed both in homozygous and in heterozygous condition

Dominance in genetics is a relationship between alleles of one gene, in which the effect on the phenotype of one allele masks the contribution of a second allele at the same locus.
The first allele is dominant and the second allele is recessive.
A dominant gene would lead to the expression of its phenotype irrespective of the fact whether its allelic gene is dominant or recessive.