You are studying a population of 100 flowers that has two alleles at a locus for
ID: 220273 • Letter: Y
Question
You are studying a population of 100 flowers that has two alleles at a locus for flower color, blue (B) and green (G). There are 15 individuals with the BB genotype, 70 individuals with the BG genotype, and 15 individuals with the GG genotype. (a) What are the allele frequencies of B and G in the starting population? (10 pts)(b) Is this population in Hardy-Weinberg equilibrium? (20 pts)(c) Given the results of part b and the relative abundances of different genotypes, offer a hypothesis that could explain these data and explain your reasoning. (10 pts)
Explanation / Answer
Total population size = 100
Total number of alleles = 200 (Diploid organism)
Number of BB = 15
Number of BG = 70
Number of GG = 15
Allele frequency of B = (Number of B alleles)/Total number of alleles
= (30+70)/200
= 0.5
Allele frequency of G = (Number of G alleles)/Total number of alleles
= (30+70)/200
= 0.5
According to H-W equilibrium,
p+q = 1
0.5+0.5 = 1
p2 + 2pq + q2 = 1
0.25 + 0.5 + 0.25 = 1
The population is at H-W equilibrium.
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