Question

In 4 ‘o’clock plants, the crossing of pure-bred red and white flowered parental stocks produced pink flowered plants. This type of genotypic expression is called ___.

• A. Dominance
• B. Gene polymorphism
• C. Incomplete dominance
• D. Codominance

Answer 1

The correct option is C

Incomplete dominance

Incomplete dominance was first observed in 4 ‘o’ clock plant. The allele responsible for red colour does not completely dominate the allele for white. The new phenotype pink arises by a “blend” of the dominant and recessive phenotypes.