Question

In a population where there is a heterozygous advantage, if the relative fitness of the A1A1 (W11) genotype is 0.6, A1A2 (W12) is 1.0 and A2A2 (W22) is 0.9, at equilibrium the frequency of the A2 allele will be:

A) 0.8

B) 0.4

C) 0.6

D) 0.2

Answer #1

**Answer: C) At the equilibrium the frequency of the A2
allele will be 0.6.**

The fitness of the A1A1, A1A2, and A2A2 genotypes are 1.2, 0.9,
and 1.0, respectively. Calculate the selection coefficient and
heterozygous effect. What kind of selection is this? Where will the
population ultimately end up in terms of allele frequencies?

If the egg-to-adult survival rates of genotypes
A1A1,
A1A2, and
A2A2 are 90 percent, 85
percent, and 75 percent, and their fecundities are 50, 55, and 70
eggs per female, respectively, what are the absolute fitnesses
(W) of these genotypes? Using
A1A1 as the fitness
reference, what are the relative fitnesses (w)?
If the frequency of the A2 allele is p
= 0.5, what will be its frequency one generation later? What will
be the allele frequency when the population...

A human population in Africa living under a severe malaria
selection has the following relative fitnesses (w) of homozygous
genotypes in beta-hemoglobin locus: w11 = 0.75 for A1A1 w22 = 0.85
for A2A2 . Assume that w12 = 1.00 for A1A2 . Using heterozygote
advantage concept, determine frequency of the mutant sickle-cell
beta-hemoglobin allele (q) in this population assuming that
genotype frequencies are at balance (?p = 0; balancing selection).
why this population not considered a Hardy Weinberg Population

In a population of 10,000 beavers, three genotypes, A1A1, A1A2,
and A2A2, have different probabilities of survival to reproductive
age lA1A1 = 0.5; lA1A2 = 0.8; and
lA2A2 = 1.0. At time (t) the frequency of the homozygous
recessive individuals = 0.25. Natural selection resulting from
differences in survival to reproductive age is the only form of
evolution occurring in this population—assume 2m = 5 for all
genotypes
What is the absolute fitness (W) of each genotype?
Use equation 9...

Suppose alleles A1,A2,A3, and A4 are additive in their effects,
and the homozygote fitnessesare A1A1: 0.8, A2A2: 0.6, A3A3: 0.4,
and A4A4: 0.2. What are the heterozygote fitnesses? I fall of the
alleles are of equal frequency, what is the mean fitness for this
locus?

Consider a racoon population that exhibits variation at the G
locus, which has two possible alleles: G1 and
G2. The population starts out at Hardy Weinberg
Equilibrium and the frequency of the G1 allele in the
original population is 0.3. The relative fitness of each genotype
during this generation is listed below. Use information to answer
the following questions.
w11 = 0.8
w12 = 1.0
w22 = 0.5
Calculate the average fitness for the population.
Calculate the genotype frequencies in...

Please show work so I can get a full understanding.Thank you!
:)
1. Consider the equation ?p = p(1/2 ? p)(1 ? p) Find all of its
equilibria and classify them in terms of stability.
2. What is the equilibrium frequency of a recessive gene arising
with a mutation rate of 4×10?6 and a reproductive fitness in
homozygotes of 0.8? What would it be if the gene were partially
recessive with h = 0.05? How different are these two equilibrium...

Please show work so I can get a full understanding.Thank you!
:)
1. Consider the equation ∆p = p(1/2 − p)(1 − p) Find all of its
equilibria and classify them in terms of stability.
2. What is the equilibrium frequency of a recessive gene arising
with a mutation rate of 4×10−6 and a reproductive fitness in
homozygotes of 0.8? What would it be if the gene were partially
recessive with h = 0.05? How different are these two equilibrium...

Suppose a researcher performed an experiment to determine the
number of genes affecting fruit size in tomatoes. She crossed a
domesticated, heirloom tomato plant with a wild tomato plant for
two generations to obtain F2 individuals. In the parental lines,
the domesticated tomatoes had a fruit diameter of 17 cm and the
wild tomatoes had a fruit diameter of 5 cm.
If fruit size is an additive genetic trait, what number of genes
should we expect to contribute to this...

Complete the following 10 questions. To get complete credit, you
must show your work for calculations and type the correct answers
in the yellow highlighted boxes. Round final calculations to two
digits. Partial credit will be given for using the correct
equations, but getting the wrong answer. Minimal credit (a quarter
of possible points) will be given for providing answers with no
equations. Even if you only answer a few of the questions, submit
the assignment on time. Material covered...

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