In a certain population, the frequency of three genotypes is as follows:

What is the likely frequency of B and b alleles?

The likely frequency of B alleles is sum total of all of BB alleles frequency plus half of the combined frequency of Bb alleles.

i.e., Frequency of B = all of BB + of Bb

⇒ Frequency of B = 22% +

⇒ Frequency of B = 22% + 31% = 53%

Similarly the likely frequency of b alleles can be calculated as

Frequency of b = all of bb + of Bb

⇒ Frequency of b = 16% +

⇒ Frequency of b = 16% + 31% = 47%

Hence the likely frequency of B and b alleles is 53% and 47% respectively.