Population Evolution

Review Questions

What is the difference between micro- and macroevolution?

  1. Microevolution describes the evolution of small organisms, such as insects, while macroevolution describes the evolution of large organisms, like people and elephants.
  2. Microevolution describes the evolution of microscopic entities, such as molecules and proteins, while macroevolution describes the evolution of whole organisms.
  3. Microevolution describes the evolution of organisms in populations, while macroevolution describes the evolution of species over long periods of time.
  4. Microevolution describes the evolution of organisms over their lifetimes, while macroevolution describes the evolution of organisms over multiple generations.

Hint:

C

Population genetics is the study of:

  1. how selective forces change the allele frequencies in a population over time
  2. the genetic basis of population-wide traits
  3. whether traits have a genetic basis
  4. the degree of inbreeding in a population

Hint:

A

Which of the following populations is not in Hardy-Weinberg equilibrium?

  1. a population with 12 homozygous recessive individuals (yy), 8 homozygous dominant individuals (YY), and 4 heterozygous individuals (Yy)
  2. a population in which the allele frequencies do not change over time
  3. p2 + 2pq + q2 = 1
  4. a population undergoing natural selection

Hint:

D

One of the original Amish colonies rose from a ship of colonists that came from Europe. The ship’s captain, who had polydactyly, a rare dominant trait, was one of the original colonists. Today, we see a much higher frequency of polydactyly in the Amish population. This is an example of:

  1. natural selection
  2. genetic drift
  3. founder effect
  4. b and c

Hint:

D