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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?