Probability Practice Problems

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 since 7 Jan 2008 

Practice Problems, Solutions to be posted

  1. Suppose the frequency of the A, B, and O alleles are 0.5, 0.2, and 0.3.
    • What is the probability of an AB individual?
    • What is the probability of an O individual?
    • What is the probability of an A individual?

  2. If the frequency of the Rh negative allele is 0.2, using the same A, B, and O frequencies as above
    • What is the probability of an Rh negative individual?
    • What is the probability of an Rh heterozygote?
    • What is the probability of an O negative individual?
    • What is the probability of an A positive individual?

  3. Suppose the frequency of a particular blood type is 0.01 (one in a hundred).
    • What is the probability that we do not see this blood type if we sample 50 individual?
    • What is the probability of not seeing this blood type in a sample of 100 individuals?
    • How many individuals do we need to sample to have a 90 percent probability of seeing AT LEAST one individual with this blood type?