Question

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 differences in parasite resistance.

The fitness of AA is 0.38, the fitness of Aa is 0.38, while the fitness of aa is 0.24.

A allele starts at a frequency of 0.67.

Assuming Hardy-Weinberg equilibrium except for differences in selection, what will the frequency of A be in the next generation?

Answer #1

1)

1% indicate 1/100

frequency of allele P = 1/100 or 0.01

frequency of allele A = 99/100 or 0.99

frequency of heterozygote ( AP) 2pq = 2X 0.01X0.99

**=0.0198**

2)

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...

43. A gene has two alleles a and b. In the
gene pool, the a allele accounts for 70 percent of the
alleles at this locus. If the population is in Hardy-Weinberg
equilibrium, what percentage of the population is heterozygotes
with respect to this locus?
A. 21 percent
B. 30 percent
C. 49 percent
D. 70 percent

Assume there is a locus in a population with two alleles
(p and q), where p = 0.7. Assume there are 100 individuals in this
population. If the locus is in Hardy-Weingberg equilibrium, how
many individuals of each genotype are expected?

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?

1.) What gives rise to different variations of traits within a
species?
a.
Different alleles of a gene
b.
Varying distances between genes
c.
Natural selection
D. None of the above
2.) Crossing true breeding dark-coated sheep with true breeding
light-coated sheep always results in 100% dark-coated offspring.
You are screening a population of 300 Soay sheep for coat color,
and you count 224 dark sheep and 76 light sheep. What is the
genotype frequency of the homozygous recessive sheep...

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...

There are three different alleles at the same locus that
contribute to blood type. A homozygote for AA will be type A, a
homozygote for BB will be type B, and a homozygote for ii will be
type O. Heterozygotes exist as well, where A is codominant with B
(producing type AB), and both A and B are dominant to i. In a
population, 4% are type O, and 1% of the individuals are homozygous
for type A. Fill in...

1) Rabbit’s ears can be either short (dominant) or floppy
(recessive). If a population of rabbits in Hardy-Weinberg
equilibrium has 250 short eared rabbits and 100 floppy eared
rabbits, what is the allele frequency of the “short” allele?
A.0.714
B.0.465
C.0.845
D.0.535
2)You are observing the suit (clubs, diamonds, hearts, or
spades) of a randomly drawn card from a deck. What is the degree(s)
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Recently, researchers found evidence that a single locus in the
human genome (called CYP1A2) may affect how different
people metabolize caffeine. Humans with two copies of the “fast”
allele at this locus feel an immediate effect from caffeine that
dissipates quickly. Humans with one or more copies of the “slow”
allele experience a slower-building but longer-lasting effect after
consuming caffeine. Research suggests that about 38% of the human
population are homozygous fast metabolizers, 44% are heterozygotes,
and 18% are homozygotes...

3) In general, p = allele frequency of the dominant allele and q
= allele frequency of the recessive allele. Using the product
and/or sum rule(s), use these variables (p and q) to determine the
probabilities of an individual in the next generation being:
a) Homozygous dominant (A dominant allele (A) AND another
dominant allele (A))?
b) Homozygous recessive (A recessive allele (a) AND another
recessive allele (a))?
c) Heterozygote (Aa OR aA)?
4a) In a population in Hardy-Weinberg equilibrium,...

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