Question

# Frequency of an autosomal recessive lethal gene is $$0.4$$. Frequency of carrier in a population of $$200$$ individuals is?

A
72
B
96
C
104
D
36

Solution

## The correct option is A $$96$$The frequency of the recessive allele is $$q = 0.4$$ (given)Hence, $$p = 1-0, 4 = 0.6$$ (as p = 1- q)According to Hardy- Weinberg principle,  $$p^2$$ + $$2pq$$ + $$q^2$$ =$$1$$hence,       $$p^2 = (0.6)^2 = 0.36$$$$q^2 = (0.4)^2 = 0.16$$$$2pq = 0.48$$since, $$2pq$$ is the frequency of hetrozygous carrier,= $$0.48 \times 200$$= $$96$$ IndividualsSo, the correct answer is$$'96'$$.Biology

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