Question

The allele for a sixth finger is dominant and the allele for a non-sixth finger is recessive. In the human population the percentage of people with the dominant phenotype is LESS than the percentage of people with the recessive phenotype. How could you explain this?

Answer 1

Step-by-step explanation:

Polydactyly is having six fingers as against the 5 fingers. The Sixth fingers grows out like normal finger giving an additional finger.

Polydactyly is usually expressed in dominant form, when an individual is recessive for the traits such individual have 5 fingers.

In human, the rate of occurrence for polydactyly is low this is because it is a rare occurrence and it takes two individual who have the allele to produce an individual who will be dominant of the allele. The recessive allele is what is common to human.