Question

In a population of $200$ organisms if only eight organisms have recessive form of character, then find out the percentage of dominant alleles of that character in population

• A. $20$%
• B. $16$%
• C. $96$%
• D. $80$%

Answer 1

The correct option is D $80$%

In the given problem, the number of organisms having recessive character are 8 out of 200, that is 4%.

Frequency of homozygous recessive (q${}^2$) = 0.04.

Therefore, frequency of recessive allele (q) = 0.2.

Therefore, frequency of dominant allele (p) = 1 - 0.2 = 0.8.

Hence, the percentage of dominant alleles in a population = 0.8 * 100 = 80%.

Thus, the correct answer is option D.