Question

If a character is controlled by 5 alleles, the possible phenotypes in the population are:

• A. 5
• B. 10
• C. 6
• D. 15

Answer 1

The correct option is C 6

The number of phenotypes of multiple alleles of a gene in a population can be calculated using the formula (n+1), where n is the number of alleles.

Thus, here the number of phenotypes would be 5 +1= 6.

For example, human blood groups ABO, are controlled by three alleles
($I^A,I^B$ and i) and there are 3+1 =4 phenotypes (A, B, AB and O).