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.**

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 populationâ€”assume 2m = 5 for all
genotypes
What is the absolute fitness (W) of each genotype?
Use equation 9...

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...

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...

If the frequency of people with sickle-cell anemia in a village
in Africa is 0.0025, and the population is at Hardy-Weinberg
equilibrium, which is closest to the frequency of
heterozygous carriers of the sickle-cell
allele?
A) 0
B) 0.0025
C) 0.005
D) 0.025
E) 0.05
F) 0.1
G) 0.2
H) 0.3
I) 0.4
J) 0.45
K) 0.5
L) 0.6
M) 0.7
N) 0.8
O) 0.9
P) 0.95
Q) 0.975
R) 0.9975
S) 1

Question 2
The allele frequencies for a population are A = 0.6 and a = 0.4.
Conditions change and fitness values are now AA = 0.3, Aa = 0.7 and
aa = 1.0. What is the allele frequency of A in the next
generation?
A.
between 0.6 and 0.7
B.
between 0.5 and 0.6
C.
between 0.4 and 0.5
D.
0.6
E.
between 0.3 and 0.4
Question 7
A gene exists in two alleles designated P and p. If 65...

1. You are studying a population in Hardy-Weinberg equilibrium,
where eye colour is controlled by a single gene. This gene has 3
alleles: A1 is dominant to A2 and A3, and the phenotype is brown
eyes A2 is dominant to A3, and the phenotype is blue eyes A3
phenotype is green eyes.
a) What eye colour would be expected for someone whose genotype
is A2A3? a) Green b) Blue c) Brown b)
b) If the frequency of the A1 allele...

If the frequency of people with sickle-cell anemia in a village
in Africa is 0.0025, and the population is at Hardy-Weinberg
equilibrium, which is closest to the frequency of the sickle-cell
allele?
A) 0
B) 0.0025
C) 0.005
D) 0.025
E) 0.05
F) 0.1
G) 0.2
H) 0.3
I) 0.4
J) 0.45
K) 0.5
L) 0.6
M) 0.7
N) 0.8
O) 0.9
P) 0.95
Q) 0.975
R) 0.9975
S) 1

The frequency of a recessive allele q in an island population is
0.8 and the frequency of allele q in a mainland population is 0.3.
One season, some individuals from the island migrate to the
mainland. After this migration, 20% of the mainland population
consists of migrants from the island. What will be the frequency of
allele q in the mainland population in the next generation?
a) 0.4
b) 0.5
c) 0.1
d) 0
e) 0.6

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