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Hardy Weinberg Problems

Hardy Weinberg Problems. Hardy-Weinberg (Cheat Sheet). These are helpful tips for Hardy-Weinberg. p 2 is equal to (WW)% 2pq is equal to ( Ww )% q 2 is equal to ( ww )% p + q = 1 ALWAYS write down variables given to you ALWAYS write down variables you are looking for. Setup Problem.

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Hardy Weinberg Problems

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  1. Hardy Weinberg Problems

  2. Hardy-Weinberg (Cheat Sheet) • These are helpful tips for Hardy-Weinberg • p2is equal to (WW)% • 2pq is equal to (Ww)% • q2 is equal to (ww)% • p + q = 1 • ALWAYS write down variables given to you • ALWAYS write down variables you are looking for

  3. Setup Problem • If 98 out of 200 individuals in a population express the recessive phenotype, what percent of the population would you predict would be heterozygotes? Workspace

  4. Problem #1 • Cystic fibrosis is a double recessive condition that affects about 1 in 2,500 babies in the Caucasian population of the United States. Please calculate the following: • The frequency of the recessive allele in the population. • The frequency of the dominant allele in the population. • The percentage of heterozygous individuals (carriers) in the population.

  5. Hardy-Weinberg • Workspace…

  6. Problem #2 • A rather large population of robins have 396 red-sided individuals and 557 tan-sided individuals. Assume that red is totally recessive. Please calculate the following: • The allele frequencies of each allele. • The expected genotype frequencies. • The number of heterozygous individuals that you would predict to be in this population.

  7. Hardy-Weinberg • Workspace…

  8. Problem #3 • A scientist is studying a population of Keel Billed Toucans. A Keel Billed Toucan has a green and orange beak if it is homozygous dominant; green, orange, red and blue beak if it is heterozygous; and a red and blue beak if it is homozygous recessive. • The first year of the study there were 33 of 187 toucans that had a red and blue beak • The second year of the study there were 78 of 201 toucans that had a green and orange beak • Are the alleles of the population changing? • If so what is the change of the allele frequencies for dominant and recessive

  9. Hardy-Weinberg • Workspace…

  10. Problem #4 • After graduation, you and 19 friends build a raft (10 male and 10 female), sail to a deserted island, and start a new population, totally isolated from the world. Two of your friends carry (that is, are heterozygous for) the recessive cystic fibrosis allele, which in homozygous recessive cases causes cystic fibrosis. • Assuming that the frequency of this allele does not change as the population grows, what will be the instance of cystic fibrosis on your island? • Cystic fibrosis births on the island is how many times greater than the original mainland? The frequency of births on the mainland is .059%.

  11. Hardy-Weinberg • Workspace…

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