BIOLOGY REVISION AND STUDY EXAM
QUESTIONS AND ANSWERS COMPLETE
AND VERIFIED.
Which of the outcomes represents the expected genotypes of an F, generation
consisting of eight individuals from an initial
cross of a true-breeding black (BB) rabbit and a true-breeding white (bb) rabbit?
8 progenies: 2 BB, 2 bb, 4 Bb
Which of the statements explains why all of the F, females from a cross between a
red-eyed homozygous female fly and a white-
eyed male fly are heterozygous?
The male parent provides them with a white-eye allele on the X, and the female
parent provides them with a red-eye allele on the X.
A true-breeding black rabbit is crossed with a true-breeding white rabbit. If the
black color trait is dominant, which of the
outcomes represents the expected phenotype of an F2 generation consisting of
eight individuals?
6 black rabbits, 2 white rabbits, O gray rabbits
You are given two true-breeding groups of rabbits. The first group has floppy ears
and white fur. The second group has straight
ears and black fur. When you perform a cross of these two groups to obtain an F1
generation you see that all of your rabbits have
floppy ears and gray fur. Which of the possibilities appears to be supported by
what you see in the F generation?
Floppy ears are dominant over straight ears; fur color is determined by incomplete
dominance
,In fruit flies, what kind of eye color would be expressed in male progeny from a
white-eyed female and a red-eyed male?
All males would have white eyes
While doing a pedigree analysis of a European royal family, you notice a disease in
a female child of two healthy parents. There
are also some cousins with the same genetic disease. If this disease is controlled
by a single gene, then the most likely explanation
for these observations is the disease is:
recessive and only seen in homozygous recessive individuals such as the daughter
A testcross involves crossing with a_______
individual and is used to determine the______
of the tested parent.
homozygous recessive; genotype
The maximum frequency of recombination between two genes is:
50%
When Mendel crossed true-breeding dominant yellow-seed plants with true-
breeding recessive green-seed plants, the offspring
were phenotypically:
yellow-seed plants
True or False
The tips of the arms of the X and Y chromosomes share small regions of
homology. Genes located in these regions are inherited
in the same manner as the ones found in autosomes.
True
You are examining a human pedigree for a trait. You notice that an offspring can
be affected even if neither parent is affected. This
immediately tells you that the trait is:
,Recessive
An epithelial tissue is defined as:
a collection of cells that lines cavities or outside surfaces.
Which is the correct decreasing order of cytoskeletal elements from largest
filament diameter to smallest filament diameter?
microtubules → intermediate filaments → microfilaments
Cadherins bind to which type of cytoskeletal element(s)?
both intermediate filaments and microfilaments
________is a specific type of extracellular matrix.
Basal lamina
The extracellular matrix is:
a network of proteins and polysaccharides outside the cell that play a role in
structural support.
A tissue is generally composed of several organs
false
Cadherin is an example of:
a cell adhesion molecule.
________could be a part of the extracellular matrix made by a plant cell.
Lignin
Within the plant cell wall, the primary cell wall contains ______, and the secondary
cell wall is composed of
both pectin and cellulose; both lignin and cellulose
The basal lamina is:
a specialized form of the extracellular matrix found beneath all epithelial tissues.
, Which answer choice is true about the motor proteins myosin and kinesin?
They both use the energy of ATP.
The extracellular domain of a cadherin protein can only bind to:
the extracellular domain of the same type of cadherin
__________ is not a cellular function of microfilaments.
Movement of motile cilia
The classic experiment using isolated cells from two species of sponges provided
evidence that:
cell adhesion molecules are species specific.
A researcher is assessing the expression of a specific protein in cells. This protein
appears as a "web" in the cytoplasm of cells. The protein is likely:
a component of the cytoskeleton.
Metastatic cancer cells have a dynamic actin cytoskeleton associated with their
plasma membrane. The presence of the membrane cytoskeleton most likely
accounts for:
the ability of these cells to move and crawl to new locations in the body.
You isolate some cells from a skin sample and determine that they have many
cell junctions with other cells and a complex system of cytoskeletal elements.
Are the cells in this sample more likely to be keratinocyte or fibroblast cells?
keratinocyte
Could melanin granules be moved by dynein and kinesin along an actin
microfilament?
No, these motor proteins are specific to microtubules and cannot move along
microfilaments.
Gap junctions and plasmodesmata have what feature in common?
They both allow direct transport of materials between cells.
QUESTIONS AND ANSWERS COMPLETE
AND VERIFIED.
Which of the outcomes represents the expected genotypes of an F, generation
consisting of eight individuals from an initial
cross of a true-breeding black (BB) rabbit and a true-breeding white (bb) rabbit?
8 progenies: 2 BB, 2 bb, 4 Bb
Which of the statements explains why all of the F, females from a cross between a
red-eyed homozygous female fly and a white-
eyed male fly are heterozygous?
The male parent provides them with a white-eye allele on the X, and the female
parent provides them with a red-eye allele on the X.
A true-breeding black rabbit is crossed with a true-breeding white rabbit. If the
black color trait is dominant, which of the
outcomes represents the expected phenotype of an F2 generation consisting of
eight individuals?
6 black rabbits, 2 white rabbits, O gray rabbits
You are given two true-breeding groups of rabbits. The first group has floppy ears
and white fur. The second group has straight
ears and black fur. When you perform a cross of these two groups to obtain an F1
generation you see that all of your rabbits have
floppy ears and gray fur. Which of the possibilities appears to be supported by
what you see in the F generation?
Floppy ears are dominant over straight ears; fur color is determined by incomplete
dominance
,In fruit flies, what kind of eye color would be expressed in male progeny from a
white-eyed female and a red-eyed male?
All males would have white eyes
While doing a pedigree analysis of a European royal family, you notice a disease in
a female child of two healthy parents. There
are also some cousins with the same genetic disease. If this disease is controlled
by a single gene, then the most likely explanation
for these observations is the disease is:
recessive and only seen in homozygous recessive individuals such as the daughter
A testcross involves crossing with a_______
individual and is used to determine the______
of the tested parent.
homozygous recessive; genotype
The maximum frequency of recombination between two genes is:
50%
When Mendel crossed true-breeding dominant yellow-seed plants with true-
breeding recessive green-seed plants, the offspring
were phenotypically:
yellow-seed plants
True or False
The tips of the arms of the X and Y chromosomes share small regions of
homology. Genes located in these regions are inherited
in the same manner as the ones found in autosomes.
True
You are examining a human pedigree for a trait. You notice that an offspring can
be affected even if neither parent is affected. This
immediately tells you that the trait is:
,Recessive
An epithelial tissue is defined as:
a collection of cells that lines cavities or outside surfaces.
Which is the correct decreasing order of cytoskeletal elements from largest
filament diameter to smallest filament diameter?
microtubules → intermediate filaments → microfilaments
Cadherins bind to which type of cytoskeletal element(s)?
both intermediate filaments and microfilaments
________is a specific type of extracellular matrix.
Basal lamina
The extracellular matrix is:
a network of proteins and polysaccharides outside the cell that play a role in
structural support.
A tissue is generally composed of several organs
false
Cadherin is an example of:
a cell adhesion molecule.
________could be a part of the extracellular matrix made by a plant cell.
Lignin
Within the plant cell wall, the primary cell wall contains ______, and the secondary
cell wall is composed of
both pectin and cellulose; both lignin and cellulose
The basal lamina is:
a specialized form of the extracellular matrix found beneath all epithelial tissues.
, Which answer choice is true about the motor proteins myosin and kinesin?
They both use the energy of ATP.
The extracellular domain of a cadherin protein can only bind to:
the extracellular domain of the same type of cadherin
__________ is not a cellular function of microfilaments.
Movement of motile cilia
The classic experiment using isolated cells from two species of sponges provided
evidence that:
cell adhesion molecules are species specific.
A researcher is assessing the expression of a specific protein in cells. This protein
appears as a "web" in the cytoplasm of cells. The protein is likely:
a component of the cytoskeleton.
Metastatic cancer cells have a dynamic actin cytoskeleton associated with their
plasma membrane. The presence of the membrane cytoskeleton most likely
accounts for:
the ability of these cells to move and crawl to new locations in the body.
You isolate some cells from a skin sample and determine that they have many
cell junctions with other cells and a complex system of cytoskeletal elements.
Are the cells in this sample more likely to be keratinocyte or fibroblast cells?
keratinocyte
Could melanin granules be moved by dynein and kinesin along an actin
microfilament?
No, these motor proteins are specific to microtubules and cannot move along
microfilaments.
Gap junctions and plasmodesmata have what feature in common?
They both allow direct transport of materials between cells.
