All GRE Subject Test: Biochemistry, Cell, and Molecular Biology Resources
Example Questions
Example Question #381 : Gre Subject Test: Biochemistry, Cell, And Molecular Biology
What are the phenotypic ratios for a given population for which the proportion of the dominant allele is 0.55 and that of the recessive allele is 0.45?
Homozygous dominant: 0.50
Heterozygous: 0.30
Homozygous recessive: 0.20
Homozygous dominant: 0.30
Heterozygous: 0.20
Homozygous recessive: 0.50
Homozygous dominant: 0.20
Heterozygous: 0.50
Homozygous recessive: 0.30
Homozygous dominant: 0.25
Heterozygous: 0.50
Homozygous recessive: 0.25
Homozygous dominant: 0.30
Heterozygous: 0.50
Homozygous recessive: 0.20
Homozygous dominant: 0.30
Heterozygous: 0.50
Homozygous recessive: 0.20
To solve this problem, assume Hardy-Weinberg equilibrium and use the associated equations to solve:
is dominant allele and is recessive allele
To find the phenotype ratios:
homozygous dominant
heterozygous
homozygous recessive
Example Question #31 : Molecular Biology And Genetics
Which of the following is not a tenet of Hardy-Weinberg equilibrium?
Genetic drift
No natural selection
Randomized mating
No migration
Large population
Genetic drift
The Hardy-Weinberg equilibrium does not account for genetic drift. The Hardy-Weinberg law states that genetic frequencies will remain constant in a population from generation to generation in the absence of evolutionary influences. Therefore, there is no migration, natural selection, nonrandom mating, or small populations in a Hardy-Weinberg population.