A gene has 3 alleles Wi, Wo and
Wp, with hierarchical dominance where Wi
(ivory) >...
A gene has 3 alleles Wi, Wo and
Wp, with hierarchical dominance where Wi
(ivory) > Wo (orange) > Wp (pink). In a
population of 1400 individuals the frequency of Wi = 0.2
and Wo = 0.4.
What proportion of individuals in this population is expected
to be heterozygous?
What proportion of the population will be ivory, orange and
pink?
Solutions
Expert Solution
Answer :
a. 64% of the population is expected to be
heterozygous.
b. 36% is ivory, 48% is orange, 16% is pink in the
population.
Gene P has two alleles - P and p; gene Q has two alleles - Q and
q.
If an PQ/pq female is crossed with a
pq/pq male, what percent of the offspring would have
genotype pq/pq if...
A) the genes were completely
linked (no crossing-over at all; recombination frequency =
0; 1 mark)
B) the genes are 10 map units apart (1
mark)
C) the genes are 24 map units apart (1
mark)
For either part (B) or (C)...
Gene A has two alleles, A1 and A2. Gene B has two alleles, B1
and B2. In a population, the following haplotypes are observed.
A1B1 = 0.2, A2B2 = 0.45, A1B2 = 0.15, and A2B1 = 0.2. Calculate the
extent of linkage disequilibrium, D.
Problem 3) Butterflies show 3 phenotypes due to
incomplete dominance at the D locus with alleles DY and
DB giving green phenotype in heterozygotes and yellow
and blue in homozygotes
a) A population of butterflies showed 49%
yellow, and 51% blue and green. What percentage of the gametes for
the next generation would contain the DB allele?
b) In another population only 1% of the
butterflies are blue, What is the DY allele
frequency?
c) If the butterflies were subject...
Cystic fibrosis is a genetic disorder where mutated alleles
(point or gene mutations) produce a defective transport protein
that results in organs producing a sticky mucus. Discuss how an
individual with cystic fibrosis would make the abnormal protein.
Your answer should include all the molecules and all the processes
involved in going from genotype to phenotype.
A gene in a randomly-mating population has two alleles (A,a),
and 1 in 400 individuals in the population is homozygous recessive
(aa). Calculate the frequency of heterozygotes (Aa) in the
population.
A hypothetical population of 16000 squirrels has two alleles,
FB and FW, for a gene that codes for fur
color. The table below describes the phenotype of a squirrel with
each possible genotype, as well as the number of individuals in the
population with each genotype.
genotype
phenotype (fur color)
# individuals in population
FBFB
black
8000
FBFW
gray
6000
FWFW
white
2000
In this population, p=0.6875 and q=0.3125. The expected numbers
of individuals with each phenotype are 7562.5 black,...
2) If a gene locus for has two alleles and p is .33. What is
q?
3) In a population of mice, coat color is controlled by a gene
locus with two alleles, B and W. BB mice are brown, BW are tan and
WW mice are white.
What is this type of inheritance called?
In this population there are 20 brown mice 15 tan mice and 30
white mice. Calculate p and q for this population where p =...
1. If the squirrel population of western MA has two alleles of a
gene that determines coat color and 78% of the alleles in the
population are the gray allele (the other 22% are the jet-black
allele), then the gray allele is dominant over jet-black.
Select one:
a. False
b. True
2. You meet a woman who is heterozygous for an X-linked dominant
disorder. If this woman has children, who will inherit this
disorder from her?
Select one:
a. All...
1. Are recessive alleles harmful?
2. Are all traits represented by only one
gene?
3. In any given population, can there be more than two
alleles present?