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Genetics 301 Quiz #12
Spring 2003
Class week 15

 

  1. If the frequency of an X-linked recessive condition is one in a thousand among human males, what is the expected frequency of the condition among human females? (Assume that the Hardy-Weinberg assumptions are met). (3 pts.)

    2.  

    One in a thousand squared equals one in a million.

     

     

     

     

  2. If the allele frequencies of two DNA markers detectable using PCR are 0.6 and 0.4, what will be the expected frequencies of the two homozygous types and the heterozygotes if the Hardy-Weinberg assumptions are met? (3 pts.)

 

 

0.36, 0.48, 0.16

 

 

 

3. If the frequency of albino individuals (autosomal recessive) is one in ten thousand in a human population, what is the expected frequency of heterozygotes (carriers) in the population, assuming random mating and the other Hardy-Weinberg assumptions? (4 pts.)

 

q2 = 10 –4 so q = .01. then 2pq = 2 (.99) (.01) = .0198. 0.02 would also be an acceptable answer.