present in European and North American populations of Ccpoea? Explain your reasoning. A population of 80 adult squirrels resides on campus, and the frequency of the Est1 allele among these squirrels is 0.70. Another population of squirrels is found in a nearby woods, and there, the frequency of the Est1 allele is 0.5. During a severe winter, 20 of the squirrels from the woods population migrate to campus in search of food and join the campus population. What will be the allelic frequency of Est1 in the campus population after migration?
Explanation / Answer
The data given is: Frequency of the Est1 allele on campus is 0.7 Frequency of the Est1 allele in the woods is 0.5 --------------------- Population before migration = 80 adult squirrels Population after migration = 100 adult squirrels --------------------- The frequency of the migrant genes in the new population would be 20/20+80 = 0.2. Hence the frequency of the non-migrants would be 1-0.2 = 0.8 -------------------- The frequency of the Est1 allele after migration can be calculated in the following manner: pEst1 = Frequency of non-migrants x frequency of Est1 allele on campus + frequency of migrants x frequency of Est1 allele in the woods pEst1= 0.8 x 0.7 + 0.2 x 0.5 = 0.66