Subjects

Sections | |||
---|---|---|---|

Hardy-Weinberg Model | 12 mins | 0 completed | Learn |

Genetic Variation | 19 mins | 0 completed | Learn |

0 of 1 completed

Concept

In the Hardy-Weinberg equation, p + q = 1, p and q represent the frequency of alleles in a population of diploid organisms if: a. Two or more alleles exist for that geneb. Two or more genes are needed to express a traitc. Only two alleles exist for that gened. The trait is polygenice. Only one allele exists for that gene

In the Hardy-Weinberg equation, p2 + 2pq + q2 = 1: 2pq represents: a. The frequency of homozygous recessive individualsb. The frequency of homozygous dominant individualsc. The frequency of heterozygous individualsd. The frequency of homozygous recessive and heterozygous individualse. The frequency of homozygous dominant and heterozygous individuals

At Hardy-Weinberg equilibrium: a. Allele frequencies change from one generation to the nextb. Evolution does not occurc. Allele frequencies change from one generation to the next so evolution does not occurd. Allele frequencies remain constant from one generation to the next so evolution does not occure. Allele frequencies remain constant from one generation to the next

In the Hardy-Weinberg equation, p 2 + 2pq + q 2 = 1. If the dominant allele frequency is 0.8 what percent of the population will be heterozygous? a. 32%b. 16%c. 64%d. 4%e. 40%

In the Hardy-Weinberg equation, p 2 + 2pq + q 2 = 1. If the dominant allele frequency is 0.8, what percent of the population will be homozygous dominant? a. 32%b. 16%c. 4%d. 64%e. 40%

In the Hardy-Weinberg equation, p 2 + 2pq + q 2 = 1. If the dominant allele frequency is 0.8, what percent of the population will be homozygous recessive? a. 0.64b. 0.32c. 0.04d. 0.16e. 0.40

The most common allele for any trait is always the dominant allele. a. True b. False

A population of cats is in Hardy Weinberg equilibrium for the S locus which causes patches of white fur. There are two alleles S and s. The frequency of the S allele is 0.2 and the frequency of the s allele is 0.8. What is the expected frequency of Ss cats in the population?a. 1.0 b. 0.2 c. 0.32d. 0.16 e. 0.8

You have a population of 100 individuals in HW equilibrium and there are two alleles at the T locus (T and t). If there are 64 individuals in the population with genotype tt, what is the expected frequency of the t allele under HW?a. 0.05 b. 0.06 c. 0.8 d. 0.75 e. 1.0

All of the following are criteria for maintaining Hardy-Weinberg equilibrium involving two alleles except ____.a. there should be no natural selection.b. matings must be random.c. gene flow from other populations must be zero.d. populations must be large.e. the frequency of all genotypes must be equal.

In peas, a gene shows incomplete dominance for flower color such that RR = purple, Rr = pink, and r = white. In an isolated pea patch, a killing frost takes the population out of H/W equilibrium and leaves only 36 plants with white flowers, 7 with pink flowers, and 14 with purple flowers. What is the frequency of the recessive allele in the surviving population population?a. 0.31b. 0.69c. 0.63d. 0.60e. 0.37

In a study of a population of blue-footed boobies that is in Hardy-Weinberg equilibrium, you find that 49% of the boobies have the recessive wing-color phenotype. Wing color is determined by a single autosomal gene for which there are two alleles. What would be the percentage of heterozygotes in the population?a. 59%b. 21%c. 42%d. 9%e. it cannot be determined from the information given

What is the frequency of individuals with Type B blood in a human population in Hardy-Weinberg equilibrium in which all possible blood genotypes are present if the frequency of individuals with Type O blood is 0.09 and the frequency of the I A allele is 0.5?a. 0.04b. 0.12c. 0.24d. 0.16e. it cannot be determined from the information given

For a trait (bumpy or smooth skin) with two alleles (where smooth is the recessive allele), a population of 56 toads not in Hardy- Weinberg equilibrium has 12 heterozygotes, 32 homozygous dominant toads, and the remainder have smooth skin. What is the frequency of the dominant allele in this population?a. 0.68b. 0.57c. 0.66d. 0.34e. 0.79

In a population of fiddler crabs, Uca pugilator, that is in Hardy-Weinberg equilibrium for two alleles, L and l (where L causes long antennae and l causes short antennae), 84% of the population show the dominant phenotype. What is the frequency of heterozygotes?a. 0.8b. 0.41c. 0.48d. 0.27e. 0.04

The fraggles are a population of mythical, mouse-like creatures that live in underground tunnels and chambers beneath a large vegetable garden (which supplies their food). Of the 80 fraggles in this population, 60 have green fur and 20 have gray fur. Green fur is controlled by a dominant allele and gray fur by a recessive allele. Assuming Hardy-Weinberg equilibrium, how many fraggles are homozygous dominant?a. 0.25b. 40c. 60d. 0.50e. 20

Compare the observed genotype frequencies you just calculated with the genotype frequencies expected if the population is in Hardy-Weinberg equilibrium. At day 7, is the seedling population in Hardy-Weinberg equilibrium, or is evolution occurring?

Enter your friends' email addresses to invite them:

We invited your friends!

Join **thousands** of students and gain free access to **23 hours** of Biology videos that follow the topics **your textbook** covers.