Name _________________________ Date _____________________
Solving Hardy-Weinberg Problems www.bozemanscience.com
1. What do the following represent?
P = q =
Remember p + q = 1
2. The other Hardy-Weinberg equation is p 2 + 2pq + q 2 = 1
What do the following represent? p 2 =
2pq = q 2 =
3. Show your work here for the 1 st problem Mr. Anderson gives you. Sixteen percent of a population is unable to taste the chemical PTC. These non-tasters are recessive for the tasting gene. a. What % of the population are tasters? b. What is the frequency of the dominant and recessive allele? c. What % of the population are heterozygous for the trait?

4. Show your work. The delta-32 mutation, a recessive gene, gives humans protection against HIV infection. The allele frequency in a town in Sweden is 20%. a. What % of the population has two copies of the gene and are therefore immune to HIV? b. What % of the population are less susceptible to the disease since they are heterozygous?
5. Mrs. Pratt’s question:
Are you confused with Hardy-Weinberg? __________
If so, what confuses you about the solving of these types of problems?