Introduction to Biology - C190 WGU UNIT REVIEW
questions with verified answers
A female patient comes to you because her mother and grandfather have both
developed Huntington disease. She is concerned about developing the disease.
Her father does not have a history of Huntington disease in his family.
Huntington disease is a Ans✓✓✓-phenotype
A patient's brother was tested for Huntington disease and the results were
negative (the brother would not develop Huntington disease). The patient wants
to know the probability that she will have the disease.
The same patient has not been tested herself but wants to know the chance that
her children will have the disease. Her partner does not have a history of the
disease in his family.
Assuming that neither parent of the patient's partner carries the disease allele,
what is the chance that their child will have Huntington disease? Ans✓✓✓-25%
A patient's brother was tested for Huntington disease and the results were
negative (the brother would not develop Huntington disease). The patient wants
to know the probability that she will have the disease.
What is the chance that the patient has inherited the Huntington allele?
Ans✓✓✓-50%
,A person with Huntington disease always has at least a 50% chance of passing the
disease on to his or her offspring. The other partner does not need to have the
disease allele in order for the child to develop it. The trait is equally common in
males and females. An individual either has or does not have the trait. There is no
intermediate phenotype.
What is the inheritance pattern of Huntington disease? Ans✓✓✓-Autosomal
dominant
A scientist has used a staining dye to observe multiple cells. Not all cells were
stained. The stained cells were smaller and contained circular DNA. The unstained
cells were larger and contained linear DNA.
Another stain is used to investigate a plant protein. It is found that the protein is
localized to the chloroplast.
What is a reasonable hypothesis for the function of this protein? Ans✓✓✓-This
protein could be used in photosynthesis.
A scientist has used a staining dye to observe multiple cells. Not all cells were
stained. The stained cells were smaller and contained circular DNA. The unstained
cells were larger and contained linear DNA.
How do the stained and unstained cells differ? Ans✓✓✓-The stained cell does
not have complex organelles.
A scientist has used a staining dye to observe multiple cells. Not all cells were
stained. The stained cells were smaller and contained circular DNA. The unstained
cells were larger and contained linear DNA.
, What kind of cell is stained here? Ans✓✓✓-Prokaryotic
A stain can also work by attaching to the cell membrane itself.
If a stain attaches to the hydrophobic portion of the cell membrane, which part of
the cell membrane will be stained? Ans✓✓✓-The inner layer
A woman has a family history of two different genetic diseases: cystic fibrosis and
galactosemia. Both of these diseases are caused by a recessive allele. The woman
has been tested and finds that she is a carrier for both diseases. She wants to
discuss what this means for possible future children she may have.
Assume that uppercase C is a normal allele and lowercase c is an allele for cystic
fibrosis. Which statement correctly describes how the law of segregation applies
to these alleles? Ans✓✓✓-The woman's egg cells will be equally likely to contain
a C allele or a c allele.
A woman has a family history of two different genetic diseases: cystic fibrosis and
galactosemia. Both of these diseases are caused by a recessive allele. The woman
has been tested and finds that she is a carrier for both diseases. She wants to
discuss what this means for possible future children she may have.
If uppercase G represents a normal allele and lowercase g represents an allele for
galactosemia, what are the possible gametes this woman can produce when
considering both diseases? Ans✓✓✓-GC, Gc, gC, or gc
A woman has a family history of two different genetic diseases: cystic fibrosis and
galactosemia. Both of these diseases are caused by a recessive allele. The woman
has been tested and finds that she is a carrier for both diseases. She wants to
discuss what this means for possible future children she may have.
questions with verified answers
A female patient comes to you because her mother and grandfather have both
developed Huntington disease. She is concerned about developing the disease.
Her father does not have a history of Huntington disease in his family.
Huntington disease is a Ans✓✓✓-phenotype
A patient's brother was tested for Huntington disease and the results were
negative (the brother would not develop Huntington disease). The patient wants
to know the probability that she will have the disease.
The same patient has not been tested herself but wants to know the chance that
her children will have the disease. Her partner does not have a history of the
disease in his family.
Assuming that neither parent of the patient's partner carries the disease allele,
what is the chance that their child will have Huntington disease? Ans✓✓✓-25%
A patient's brother was tested for Huntington disease and the results were
negative (the brother would not develop Huntington disease). The patient wants
to know the probability that she will have the disease.
What is the chance that the patient has inherited the Huntington allele?
Ans✓✓✓-50%
,A person with Huntington disease always has at least a 50% chance of passing the
disease on to his or her offspring. The other partner does not need to have the
disease allele in order for the child to develop it. The trait is equally common in
males and females. An individual either has or does not have the trait. There is no
intermediate phenotype.
What is the inheritance pattern of Huntington disease? Ans✓✓✓-Autosomal
dominant
A scientist has used a staining dye to observe multiple cells. Not all cells were
stained. The stained cells were smaller and contained circular DNA. The unstained
cells were larger and contained linear DNA.
Another stain is used to investigate a plant protein. It is found that the protein is
localized to the chloroplast.
What is a reasonable hypothesis for the function of this protein? Ans✓✓✓-This
protein could be used in photosynthesis.
A scientist has used a staining dye to observe multiple cells. Not all cells were
stained. The stained cells were smaller and contained circular DNA. The unstained
cells were larger and contained linear DNA.
How do the stained and unstained cells differ? Ans✓✓✓-The stained cell does
not have complex organelles.
A scientist has used a staining dye to observe multiple cells. Not all cells were
stained. The stained cells were smaller and contained circular DNA. The unstained
cells were larger and contained linear DNA.
, What kind of cell is stained here? Ans✓✓✓-Prokaryotic
A stain can also work by attaching to the cell membrane itself.
If a stain attaches to the hydrophobic portion of the cell membrane, which part of
the cell membrane will be stained? Ans✓✓✓-The inner layer
A woman has a family history of two different genetic diseases: cystic fibrosis and
galactosemia. Both of these diseases are caused by a recessive allele. The woman
has been tested and finds that she is a carrier for both diseases. She wants to
discuss what this means for possible future children she may have.
Assume that uppercase C is a normal allele and lowercase c is an allele for cystic
fibrosis. Which statement correctly describes how the law of segregation applies
to these alleles? Ans✓✓✓-The woman's egg cells will be equally likely to contain
a C allele or a c allele.
A woman has a family history of two different genetic diseases: cystic fibrosis and
galactosemia. Both of these diseases are caused by a recessive allele. The woman
has been tested and finds that she is a carrier for both diseases. She wants to
discuss what this means for possible future children she may have.
If uppercase G represents a normal allele and lowercase g represents an allele for
galactosemia, what are the possible gametes this woman can produce when
considering both diseases? Ans✓✓✓-GC, Gc, gC, or gc
A woman has a family history of two different genetic diseases: cystic fibrosis and
galactosemia. Both of these diseases are caused by a recessive allele. The woman
has been tested and finds that she is a carrier for both diseases. She wants to
discuss what this means for possible future children she may have.
