Overview
Hardy Weinberg HomeworkDirections: Complete these homework problems. You can complete this quiz up to two times. Canvas will keep the highest score.
INTRODUCTION
It is a common misconception that, over the course of generations in a population, the dominant alleles of a gene will eventually replace the recessive alleles of a gene. However, in the absence of evolutionary forces, the proportions of both dominant and recessive alleles in a population are maintained from one generation to the next. This feature of populations is explained by the Hardy–Weinberg rule.
To explore the Hardy–Weinberg rule, let’s consider a large population in which the males and females mate randomly. Let’s also assume that there is no migration, that mutation can be ignored, and that natural selection does not affect the alleles under consideration. Such random mating results in each gamete having an equal probability of obtaining either member (allele) of the gene pair.
In our population, a particular gene is represented by two alleles, A and a. If the frequency of alleles A and a among both eggs and sperm are represented by p and q, respectively, then the result that both the gametes will carry an A allele is determined by the multiplication rule: p x p = p2. This is the frequency of the AA homozygote in the next generation. There are two ways to generate a heterozygote, so the probability of the heterozygote Aa will be (p x q) + (q x p) = 2pq. The probability of the homozygote aa will be q x q = q2.
Question 1. ( 4 points)
A school of fish is made up of 130 individuals. Of those 130 individuals, 37 have iridescent scales, which is a recessive phenotype.
What is the frequency of the homozygous recessive genotype?Question Blank 1 of 3 type your answer...............
What is the frequency of the recessive allele? Question Blank 2 of 3 type your answer................
What is the frequency of the dominant allele? Question Blank 3 of 3 type your answer...
Question 2.
Gene Alleles Allele Frequency
Gene 1 X 0.55
x 0.45
Gene 2 Y 0.98
y 0.02
Gene 3 Z 0.10
z 0.90
The table shows allele frequencies for three different genes within a population of turtles. If this population has achieved Hardy-Weinberg equilibrium and conditions are right for maintaining equilibrium, what is the probability that any of the frequencies of alleles shown in the table will change in the future?
A). Gene 1 has the highest probability of changing.
B) Both genes 2 and 3 will have a higher probability of changing than gene 1.
C) All of the genes have zero probability of changing.
D). Gene 2 has the highest probability of changing.
Question 3.
Determine the frequency of a homozygous recessive genotype (q2) if the frequency of the dominant allele is p = 0.8. Assume that there are only two types of alleles (A and a) for this gene in the population. The frequency of the homozygous recessive genotype for this questions is Question Blank 1 of 1 type your answer...
Question 4
There are several assumptions of hardy-weinberg equilibrium. Which of the following is NOT an assumption of hardy-weinberg equilibrium There are several assumptions of hardy-weinberg equilibrium. Which of the following is NOT an assumption of hardy-weinberg equilibrium
A) Natural selection is acting on the population.
B). The population is large.
C) There is no mutation
D) There is no migration into or out of the population
Question 5.
A population of rabbits may be brown (the dominant phenotype) or white (the recessive phenotype). Brown rabbits have the genotype BB or Bb. White rabbits have the genotype bb. The frequency of the BB genotype is 0.35. What is the frequency of heterozygous rabbits? Question Blank 1 of 3 type your answer...