Honors
Practice Problems
1. Evolution occurs at the level of a. the individual genotype b. the individual phenotype c. environmentally based phenotypic variation d. the population
2. What does natural selection act upon? a. The gene pool of the species b. The genotype c. The phenotype d. Multiple gene inheritance systems
3. Suppose a particular species of flowering plant that lives only one year can produce red, white, or pink blossoms, depending on its genotype. Biologists studying a population of this species count 300 red-flowering, 500 white-flowering, and 800 pink-flowering plants in a population. When the population is censused the following year, 600 red-flowering, 900 white-flowering, and 1000 pink-flowering plants are observed. Which color has the highest fitness? a. Red b. White c. Pink
4. The ability to taste the chemical PTC is determined in humans by a dominant allele T, with tasters having the genotypes Tt or TT and nontasters having tt. If you discover that 36% of the members of a population cannot taste PTC, then according to Hardy-Weinberg equation, the frequency of the T allele should be a. 0.4 b. 0.6 c. 0.64 d. 0.8
5. A gene in humans has two alleles, M and N, that code for different surface proteins in red blood cells. If you know what the frequency of allele M is 0.2, according to the Hardy-Weinberg equation, the frequency of the genotype MN in the population should be a. 0.16 b. 0.32 c. 0.64 d. 0.8
6. If the frequency of allele b in a gene pool is 0.2, according to the Hardy-Weinberg equation, the expected frequency of the genotype bbb in a triploid (3n) plant species would be a. 0.008 b. 0.04 c. 0.08 d. 0.2
7. A small, isolated population would most likely be subject over time to a. assortative mating b. a founder effect c. genetic drift d. gene flow
8. Which definition of evolution would have been most foreign to Charles Darwin
1. Evolution occurs at the level of a. the individual genotype b. the individual phenotype c. environmentally based phenotypic variation d. the population
2. What does natural selection act upon? a. The gene pool of the species b. The genotype c. The phenotype d. Multiple gene inheritance systems
3. Suppose a particular species of flowering plant that lives only one year can produce red, white, or pink blossoms, depending on its genotype. Biologists studying a population of this species count 300 red-flowering, 500 white-flowering, and 800 pink-flowering plants in a population. When the population is censused the following year, 600 red-flowering, 900 white-flowering, and 1000 pink-flowering plants are observed. Which color has the highest fitness? a. Red b. White c. Pink
4. The ability to taste the chemical PTC is determined in humans by a dominant allele T, with tasters having the genotypes Tt or TT and nontasters having tt. If you discover that 36% of the members of a population cannot taste PTC, then according to Hardy-Weinberg equation, the frequency of the T allele should be a. 0.4 b. 0.6 c. 0.64 d. 0.8
5. A gene in humans has two alleles, M and N, that code for different surface proteins in red blood cells. If you know what the frequency of allele M is 0.2, according to the Hardy-Weinberg equation, the frequency of the genotype MN in the population should be a. 0.16 b. 0.32 c. 0.64 d. 0.8
6. If the frequency of allele b in a gene pool is 0.2, according to the Hardy-Weinberg equation, the expected frequency of the genotype bbb in a triploid (3n) plant species would be a. 0.008 b. 0.04 c. 0.08 d. 0.2
7. A small, isolated population would most likely be subject over time to a. assortative mating b. a founder effect c. genetic drift d. gene flow
8. Which definition of evolution would have been most foreign to Charles Darwin