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Bio: Which doesn't change frequency of homozygous and HZ individuals in a population?

  1. Apr 5, 2012 #1
    1. The problem statement, all variables and given/known data
    Which of the following is not a factor that causes changes in the frequency of homozygous and heterozygous individuals in a population?

    a. mutations
    b. migration
    c. random mating
    d. genetic drift
    3. The attempt at a solution

    I know that mutations is a factor, so cross out a.
    I would say that migration is a factor, so cross out b. I am now left with two options: c. & d. This is where it gets confusing.
     
  2. jcsd
  3. Apr 6, 2012 #2
    Re: Bio: Which doesn't change frequency of homozygous and HZ individuals in a populat

    OK, I know the answer. It's c. Random mating is not a factor, because in random mating males are statistically unbiased in choosing a female - in other words, they do not prefer one female over the other. The same can be said of the females.
     
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