Question

Consider a single locus in a population with 4 alleles with frequencies 0.4, 0.25, 0.15, 0.2.

The genotypes are in Hardy-Weinberg equilibrium. What is the current heterozygosity in the

population? If the population size is 100, what will the heterozygosity be after 10 generations?

If the generation time is 20 years, how long will it take for the heterozygosity to be reduced by

half?

Answer #1

Let A and a be the alleles at a locus l in a population evolving
with inﬁnite, non-overlapping
generations. Assume that the probability an AA child survives to
reproductive maturity is
0.8; for genotype Aa assume this probability is 0.6 and for
genotype aa it is 0.7. Let fA(t)
denote the frequency of A among the newborns of generation t. The
population at birth in
generation 0 is in Hardy-Weinberg equilibrium with fA(0)
= 0.4.
(a) What is the probability...

Population Genetics Question:
Consider a locus with two alleles, A and a. The frequencies of
the two homozygotes are both 0.4. What genotype is selected
against? What is the selection coefficient s?

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...

Given a single genetic locus with two alleles: A1,
which occurs at a frequency 0.75, and A2, which occurs
at a frequency of 0.25, how may individuals of genotype
A2A2 do you expect in a population of 600
individuals at Hardy-Weinberg equilibrium?

If at a locus, three alleles in a population, such that the A
allele is present at frequency 0.2, and C allele at frequency 0.4,
after one generation of random mating in a population of size 100,
the total number of heterozygotes will be:
Select one:
a. 36
b. 64
c. 10
d. 12
e. 24

Assume a population in Hardy-Weinberg equilibrium with these
genotypic frequencies: AA = 0.25, Aa = 0.50, and
aa = 0.25. If you remove all the homozygous dominants and
allow the remaining population to reproduce (again under
Hardy-Weinberg conditions), what will be the frequency of
homozygous dominants in the next generation?
Please explain all the steps

1. There are two alleles at a locus: A and P. Assume these two
alleles are in Hardy-Weinberg equilibrium. Assume also that Allele
P has a frequency of exactly 1% in the population. Given this
information, what is the frequency of AP heterozygotes in the
population?
2. You are studying an allele A that governs parasite resistance
in a large population of rabbits.
You observe that different combinations of A and a produce
phenotypes that have different fitnesses due to...

A hypothetical population ofcats has two alleles, TL
and TS, for a gene that codes for tail length. The
allele frequency of TL is 0.7 and the allele frequency
of TS is 0.3.
TLTL individuals have long tails.
TLTS individuals have medium tails.
TSTS individuals have short tails.
The equation for Hardy-Weinberg equilibrium states that at a
locus with two alleles, as in this cat population, the three
genotypes will occur in specific proportions, described by the
equation p2 +...

In a bird species, the shape of the beak is encoded by a locus
with two 2 co-dominant alleles Na and Nz. Na gives long beak in
double dose, while individuals who are homozygous for Nz have short
beak.
In a population, the following genotype frequencies were
observed:
Na Na = 0.5
Na Nz = 0.3
Nz Nz = 0.2
a) Assume a total of 600 individuals in the population. Set up a
hypothesis and use an x2 test to...

A population of humans, isolated for centuries on an island in
the Indian Ocean, exhibits the following phenotypes for the M N
blood group locus.
330 M
375 MN
295 N
LM and LN are two codominant alleles at
this locus. LMLM alleles give type M blood.
LMLN individuals are heterozygous.
LNLN individuals are type N blood.
a) Using the Hardy-Weinberg equilibrium, calculate the expected
frequencies of these blood types. Do a chisquare test of goodness
of fit to compare...

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