Final Exam Bio 340
Questions and
Complete Solutions
Denning Muriithi [Date] [Course title]
, Final exam bio 340
1.Crossing true-breeding pea plants with yellow peas with true-breeding
plants with green peas yielded an F1 generation with 100% offspring plants
with yellow peas. The F1 plants are self-fertilized and produce F2. In a ran-
domly selected set of 100 peas from F2 you notice the following
phenotypic numbers: 84 yellow and 16 green. Using the Hardy-Weinberg
principle:
What is the observed frequency of the recessive allele in this F2 population?
Correct Ans: 0.40
2.In , RNA processing involves the removal of Correct
Ans: Eukary- otes, introns
3.Mendel finds a new species of pea plant that produces two different flower
colors, white and blue, based off of a single gene with two alleles. He
crosses together two parents, a true-breeding white and a true-breeding
blue flowered plant. All of the plants in the F1 generation have blue flowers.
Two of the F1 offspring are mated. What proportion of the blue F2 offspring
is expected to be homozygous? Correct Ans: 1/3
4.In a mystical bird species, birds with the dominant allele C are white,
whereas birds homozygous for the recessive allele c are colored. This
species also have a second locus that acts as a modifier gene if the bird is
colored.
If birds are colored and are G- at the second locus, they will be yellow. If
they are colored and gg at the second locus, they will be green. You cross a
double heterozygous bird and a double homozygous recessive (CcGg x
ccgg). What percentage of the offspring will be yellow, and what percentage
will be white? Correct Ans: 25,50
5.Human ABO blood type is controlled by the I locus and has three
possible alleles. The alleles which code for type A blood (IA) and type B
blood (IB) are codominant, while the allele for type O blood (i) is recessive.
In a cross
between a person with a genotype of IAi and a person with genotype IBi,
what is the probability of having three offspring with type O blood? Correct
Ans: 1/64
6.The recombination frequencies (RF) of genes A, B, C, and D are as follows
Correct Ans: Relationship
RF
B-D 0.27 C-D 0.23 A-D 0.21 B-C 0.04 A-B 0.48
What is the order of the genes? Correct Ans: ADCB
7.Calculate the Fixation index in the Subpopulation relative to the Total
2/
8
Questions and
Complete Solutions
Denning Muriithi [Date] [Course title]
, Final exam bio 340
1.Crossing true-breeding pea plants with yellow peas with true-breeding
plants with green peas yielded an F1 generation with 100% offspring plants
with yellow peas. The F1 plants are self-fertilized and produce F2. In a ran-
domly selected set of 100 peas from F2 you notice the following
phenotypic numbers: 84 yellow and 16 green. Using the Hardy-Weinberg
principle:
What is the observed frequency of the recessive allele in this F2 population?
Correct Ans: 0.40
2.In , RNA processing involves the removal of Correct
Ans: Eukary- otes, introns
3.Mendel finds a new species of pea plant that produces two different flower
colors, white and blue, based off of a single gene with two alleles. He
crosses together two parents, a true-breeding white and a true-breeding
blue flowered plant. All of the plants in the F1 generation have blue flowers.
Two of the F1 offspring are mated. What proportion of the blue F2 offspring
is expected to be homozygous? Correct Ans: 1/3
4.In a mystical bird species, birds with the dominant allele C are white,
whereas birds homozygous for the recessive allele c are colored. This
species also have a second locus that acts as a modifier gene if the bird is
colored.
If birds are colored and are G- at the second locus, they will be yellow. If
they are colored and gg at the second locus, they will be green. You cross a
double heterozygous bird and a double homozygous recessive (CcGg x
ccgg). What percentage of the offspring will be yellow, and what percentage
will be white? Correct Ans: 25,50
5.Human ABO blood type is controlled by the I locus and has three
possible alleles. The alleles which code for type A blood (IA) and type B
blood (IB) are codominant, while the allele for type O blood (i) is recessive.
In a cross
between a person with a genotype of IAi and a person with genotype IBi,
what is the probability of having three offspring with type O blood? Correct
Ans: 1/64
6.The recombination frequencies (RF) of genes A, B, C, and D are as follows
Correct Ans: Relationship
RF
B-D 0.27 C-D 0.23 A-D 0.21 B-C 0.04 A-B 0.48
What is the order of the genes? Correct Ans: ADCB
7.Calculate the Fixation index in the Subpopulation relative to the Total
2/
8
