Question

If the frequency of a recessive phenotype in a stable population is 25%, the frequency of the dominant allelle in that population is :

• A. 50%
• B. 75%
• C. 25%
• D. 10%

Answer 1

The correct option is A 50%

A cross is made between two homozygous parent plants, is called monohybrid cross. In this cross F2 phenotypic ratio is 3:1. By means of this, we can understand that the frequency of a recessive phenotype is 25%, the frequency of the dominant allele is that population is 75%.

So, the correct option is ‘75%’.