# Hardy Weinberg Questions Essays

801 Words Feb 27th, 2013 4 Pages
Hardy-Weinberg Principle Name: _______________________________ Period: ____

Show all work and box your answer for each of the following questions! 1. In a population at genetic equilibrium, the frequency of allele A is 0.5. a. What is the frequency of the homozygous dominant genotype (AA)? b. What is the frequency of the heterozygous genotype (Aa)?

2. If 16% of the individuals in a population at genetic equilibrium are recessive (aa). a. What is the frequency of the recessive allele in the population? b. What is the frequency of the dominant allele?

3. If the genotype frequencies in a population at genetic equilibrium are 0.36 TT, 0.48 Tt, and 0.16 tt, what
In a human population of 1000, 840 are tongue rollers (TT or Tt), and 160 are non-tongue rollers (tt). What is the frequency of the dominant allele (T) in the population?

10. If 99% of the garden peas in a population at genetic equilibrium are tall (TT or Tt). What is the frequency of the dominant allele (T)?

11. The chemical phenylthiocarbamide (PTC) tastes bitter to most people but is tasteless to others. About 30% of Americans are PTC nontasters (tt), and 70% are PTC tasters (TT or Tt)). Assuming the populations is at genetic equilibrium, estimate the frequency of the nontaster (t) and the taster (T) alleles.

12. The genotype frequencies of a population are determined to be 0.6 AA, 0.0 Aa (there are no heterozygote), and 0.4 aa. A later sample reveals that the allele frequencies are p= 0.6 and q = 0.4. Is this population at genetic equilibrium? Why or why not?

13. If a population of 2000 is at genetic equilibrium but contains only 180 individuals with the recessive phenotype (rr), what is the expected frequency of the recessive allele (r) nine generations later?

14. PKU is an inherited metabolic disease in which one of the amino acids is not metabolized properly and can lead to mental retardation if left untreated. About 1 in 10,000 babies in the US is born with PKU. The defective gene is recessive and those with the disease are homozygous

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