Assume that the frequency of the recessive MC1R allele is 05

Assume that the frequency of the recessive MC1R allele is 0.5 so that 25% of the bears are white, and that the fitness of black bears is reduced by 20% because of selective hunting. What is the expected allele frequency of the recessive allele after one generation if only black bears are hunted?

Solution

Answer :-

f = 0.5

25% white bears.

we can use a formula for expected frequency as below,

f =p²+2pq+q²

^so

^{p2= 0.5}

^2pq=0.25

^q2=0.2

^{so f= 0.5+0.25+0.2}

   ^{f = 0.95}

^{now we have to calculate the proportion of recessive allele after 1 generation.}

qn= q₀/1+nqo

q1= 0.5 /1+1*0.5

q1 = 0.66 ( proportion of allele after one generation )

so fn = f*qn = 0.95*0.66 = 0.63

so expected allele frequincies will be 0.63 .