OpenStax Biology 2e Instructor Answer Guide
Biology 2e
Unit 4: Evolutionary Processes
Chapter 19: The Evolution of Populations
Visual Connection Questions
1. In plants, violet flower color (V) is dominant over white (v). If p = .8 and q = 0.2 in a
population of 500 plants, how many individuals would you expect to be homozygous dominant
(VV), heterozygous (Vv), and homozygous recessive (vv)? How many plants would you expect to
have violet flowers, and how many would have white flowers?
The expected distribution is 320 VV, 160Vv, and 20 vv plants. Plants with VV or Vv genotypes
would have violet flowers, and plants with the vv genotype would have white flowers, so a total
of 480 plants would be expected to have violet flowers, and 20 plants would have white
flowers.
, OpenStax Biology 2e Instructor Answer Guide
2. Do you think genetic drift would happen more quickly on an island or on the mainland?
Genetic drift is likely to occur more rapidly on an island where smaller populations are expected
to occur.
Biology 2e
Unit 4: Evolutionary Processes
Chapter 19: The Evolution of Populations
Visual Connection Questions
1. In plants, violet flower color (V) is dominant over white (v). If p = .8 and q = 0.2 in a
population of 500 plants, how many individuals would you expect to be homozygous dominant
(VV), heterozygous (Vv), and homozygous recessive (vv)? How many plants would you expect to
have violet flowers, and how many would have white flowers?
The expected distribution is 320 VV, 160Vv, and 20 vv plants. Plants with VV or Vv genotypes
would have violet flowers, and plants with the vv genotype would have white flowers, so a total
of 480 plants would be expected to have violet flowers, and 20 plants would have white
flowers.
, OpenStax Biology 2e Instructor Answer Guide
2. Do you think genetic drift would happen more quickly on an island or on the mainland?
Genetic drift is likely to occur more rapidly on an island where smaller populations are expected
to occur.
