PCB 3063 Genetics Final Exam Need to Study
Questions and Correct Answers-
In Mendel's pea plants, yellow was dominant over green for the seed color gene. If an
offspring from a mating of a true-breeding yellow seeded plant and a green seeded
plant was bred with a green seeded plant, what would be the expected percentage of
yellow seeded plants in this next generation? - ✔✔50%
In Mendel's pea plants, the genes that code for flower color, seed color and seed shape
are on 3 different chromosomes. For flower color, purple is dominant over white, yellow
seeds are dominant over green and round seeds are dominant over wrinkled seeds. If
you crossed two parents who were heterozygous for all 3 genes, how many purple
flowered, round and yellow seeded plants would you expect in the offspring
generation? - ✔✔27/64
Because of the formation of Barr bodies, normal human males have ___________
amount of gene products produced by the X-chromosome compared to females. -
✔✔the same
A male chicken (rooster) could be __________ for a "Z-linked" gene. -
✔✔homozygous or heterozygous
The following diagram is a cell from a species that has a diploid number of 4. What stage
of meiosis or mitosis does this diagram appear to be showing? - ✔✔anaphase II of
meiosis II
Red-green colorblindness is a recessive X-linked disorder. A woman who is homozygous
for normal vision has children with a man who has red-green colorblindness. Which of
the following phenotypes would NOT be possible in their children? - ✔✔sons with
red-green colorblindness
, Mitosis is a process of cell division that results in ____ - ✔✔2 genetically identical
daughter cells
Which of the following is an accurate description of Mendel's Law of Segregation? -
✔✔When gametes are formed, there is only one copy of every gene in each gamete.
In humans, having free earlobes is a dominant trait and having attached earlobes is
recessive. Julie has attached earlobes but both of her parents have free earlobes. Using
"F" to represent the free earlobes trait and "f" for the attached trait, what genotypes do
Julie's parents have? - ✔✔Both are Ff.
If genes A, B and C independently assort, what type(s) of gametes would a parent with
the aaBbCC genotype make? - ✔✔aBC or abC
In humans, the SRY gene has what function? - ✔✔It produces a gene product that
ultimately creates the typical male phenotype.
In cats, the gene for fur color is X-linked and there are 2 alleles, orange and black. The
tortoiseshell pattern of black and orange patches is created due to X-inactivation in a
heterozygote. A litter of kittens is born with 2 tortoiseshell females and 2 orange males.
Of the choices below, which could be the phenotypes of their parents? - ✔✔The
mother is orange and the father is black.
Given what you know about normal sex determination in humans, which of the
following statements is CORRECT? - ✔✔"XXXX" individuals would have 3 Barr bodies
in their somatic cells.
Another term for a hermaphroditic species is _______ - ✔✔monoecious
Questions and Correct Answers-
In Mendel's pea plants, yellow was dominant over green for the seed color gene. If an
offspring from a mating of a true-breeding yellow seeded plant and a green seeded
plant was bred with a green seeded plant, what would be the expected percentage of
yellow seeded plants in this next generation? - ✔✔50%
In Mendel's pea plants, the genes that code for flower color, seed color and seed shape
are on 3 different chromosomes. For flower color, purple is dominant over white, yellow
seeds are dominant over green and round seeds are dominant over wrinkled seeds. If
you crossed two parents who were heterozygous for all 3 genes, how many purple
flowered, round and yellow seeded plants would you expect in the offspring
generation? - ✔✔27/64
Because of the formation of Barr bodies, normal human males have ___________
amount of gene products produced by the X-chromosome compared to females. -
✔✔the same
A male chicken (rooster) could be __________ for a "Z-linked" gene. -
✔✔homozygous or heterozygous
The following diagram is a cell from a species that has a diploid number of 4. What stage
of meiosis or mitosis does this diagram appear to be showing? - ✔✔anaphase II of
meiosis II
Red-green colorblindness is a recessive X-linked disorder. A woman who is homozygous
for normal vision has children with a man who has red-green colorblindness. Which of
the following phenotypes would NOT be possible in their children? - ✔✔sons with
red-green colorblindness
, Mitosis is a process of cell division that results in ____ - ✔✔2 genetically identical
daughter cells
Which of the following is an accurate description of Mendel's Law of Segregation? -
✔✔When gametes are formed, there is only one copy of every gene in each gamete.
In humans, having free earlobes is a dominant trait and having attached earlobes is
recessive. Julie has attached earlobes but both of her parents have free earlobes. Using
"F" to represent the free earlobes trait and "f" for the attached trait, what genotypes do
Julie's parents have? - ✔✔Both are Ff.
If genes A, B and C independently assort, what type(s) of gametes would a parent with
the aaBbCC genotype make? - ✔✔aBC or abC
In humans, the SRY gene has what function? - ✔✔It produces a gene product that
ultimately creates the typical male phenotype.
In cats, the gene for fur color is X-linked and there are 2 alleles, orange and black. The
tortoiseshell pattern of black and orange patches is created due to X-inactivation in a
heterozygote. A litter of kittens is born with 2 tortoiseshell females and 2 orange males.
Of the choices below, which could be the phenotypes of their parents? - ✔✔The
mother is orange and the father is black.
Given what you know about normal sex determination in humans, which of the
following statements is CORRECT? - ✔✔"XXXX" individuals would have 3 Barr bodies
in their somatic cells.
Another term for a hermaphroditic species is _______ - ✔✔monoecious
