Answer:
Option A
Explanation:
Given -
Total population of rats
Out of the total population, number of rats with brown fur
Thus , the frequency of brown fur rats
It is also given that the brown fur rats are dominant to gray fur rats.
As per Hardy Weinberg's equation,
Frequency of dominant rats is given by
and here
Thus,
Frequency of homozygous recessive gray rat
Hence,
frequency of homozygous dominant rats
Hence, option A is correct