Question

Recessive gene can express itself only in________.

• A. homozygous condition
• B. heterozygous condition
• C. both above conditions
• D. none of these conditions

Answer 1

The correct option is A

homozygous condition

Recessive alleles are those which cannot express themselves in presence of a dominant allele. So, in a heterozygous (e.g.Aa or Tt) condition, recessive alleles fail to express themselves. The only condition where they can express is, in the abesnce of the dominant gene, i.e., homozygous recessive condition (e.g. aa or tt).