AnswersCO-Biology A-CRUnit Test

Unit Test — Cumulative exam Answers

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Mary has type A blood. Her son Bill has type AB blood. Which blood type does Bill's dad have if he is homogenous for blood type?

A
A
B
B
C
AB
D
O
2
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A scientist is studying fruit fly wings. Straight wings are dominant, and curly wings are recessive. Which statement correctly describes the F1 generation if a straight-winged parent is crossed with a curly-winged parent and if both parents are true breeding?

A
The offspring will have two genes for straight wings.
B
The offspring will produce only gametes that have genes for curly wings.
C
The offspring will have one allele for straight wings and one allele for curly wings.
D
The offspring will have only one kind of allele for the gene that determines wing type.
3

If a person has type B blood, which statement describes the antibodies present in his or her blood?

A
Only anti-A antibodies are present.
B
Only anti-B antibodies are present.
C
Both anti-A and anti-B antibodies are present.
D
Neither anti-A nor anti-B antibodies are present.
4

In the F2 generation of Mendel’s crosses,

A
all plants had the dominant trait.
B
half of the plants had the dominant allele.
C
all plants had both the dominant and recessive alleles.
D
one in four plants had two alleles for the recessive trait.
5

Which of Mendel’s generations was allowed to self-pollinate?

A
F1 generation
B
P generation
C
F1 generation and F2 generation
D
P generation and F2 generation
6

A pea plant exhibits a recessive trait. Which statement is most likely true about the plant?

A
The plant is identical to its parent plant.
B
The plant has different alleles for the gene that codes for the trait.
C
The plant has two identical alleles for the gene that codes for the trait.
D
The plant does not have the same genes for the trait as its parent plant.
7

Which was most likely an effect on society that resulted from improvements in blood handling during World War I and World War II?

A
More soldiers died as a result of incorrect blood typing.
B
More soldiers who had lost a limb returned home.
C
More donations were needed as a result of poor storage techniques.
D
More organizations spoke out against the war.
8

Glaucoma is a leading cause of blindness. Studies have linked a common form of glaucoma to three genes and more than 20 genetic loci. Which best describes glaucoma?

A
a recessive trait that requires multiple recessive alleles to be expressed
B
a polygenic trait that is influenced by the alleles of several genes
C
a codominant trait that is expressed more often when more dominant alleles are present
D
a dominant trait that depends on the presence of only one of many dominant alleles
9

Some people have freckles, and some people do not have freckles. If a child has freckles, at least one parent has freckles. However, the child may have a sibling that does not have freckles. Which statement best describes the presence of freckles?

A
Freckles are not determined by DNA.
B
There are two alleles for freckles.
C
There is no dominant allele for freckles.
D
Freckles are determined by two genes instead of by one.
10

What controls traits and inheritance?

A
gametes
B
nucleic acids
C
proteins
D
temperature
11

The table below summarizes the traits that Mendel examined during his experiments.Traits Studied by MendelWhat do these characteristics all have in common?

Question illustration
A
They are all dominant.
B
They can all be easily observed.
C
They are all recessive.
D
They can all be applied to other plants.
12

Which statement describes the offspring of the F1 generation when crossing a pea plant that is true breeding for green seeds with a pea plant that is true breeding for yellow seeds?

A
The green trait is the dominant trait.
B
The offspring will inherit one allele from each parent.
C
The offspring will have both green and yellow seeds.
D
Each offspring will have a unique set of alleles.
13

If a red cow (homozygous dominant) is crossed with a white cow (homozygous dominant), what alleles will the offspring have?

A
Rw
B
RW
C
rW
D
rw
14

Pietro has two dogs that are related, and he wants to understand why one of the dogs has tan fur and the other has brown fur. Which pattern of inheritance would explain the different fur color in the related dogs?

A
polygenic inheritance
B
codominance
C
incomplete dominance
D
quantitative inheritance
15

A purebred purple flowering plant is crossed with a purebred white flowering plant, and they produce offspring that have purple flowers. Which is the trait for purple flowers?

A
dominant
B
recessive
C
codominant
D
blended
16

Which has the most control of traits and inheritance?

A
gametes
B
nucleic acids
C
amino acids
D
proteins
17

Which represents polygenic inheritance of traits?

A
a cow that has red and white dominant coloring
B
a mix of blue, green, and brown eye colors
C
a plant that has pink flowers produced from a plant that has red flowers and a plant that has white flowers
D
a plant that has green seeds produced from a plant that has yellow seeds and a plant that has green seeds
18

Which statement best describes an understanding of genetics that would be missing without the work of Mendel?

A
The DNA codes for traits would not be known.
B
The protein codes for traits would not be known.
C
Some alleles are dominant, and some alleles are recessive.
D
Offspring receive two copies of each allele from each parent.
19

A student recorded the height of each student in the school. She then made a bar graph of her results. She observed that the results form a bell-shaped curve. The student could use her graph as evidence to support which argument?

A
Height is affected by multiple pairs of genes on different chromosomes.
B
The alleles for tall height and short height are codominant.
C
The allele for being tall is dominant to the allele for shorter heights.
D
There are three alleles for height that demonstrate incomplete dominance.
20

Which is the best example of a hypothesis leading to new experimental methods?

A
Gregor Mendel influenced the development of the theory that everything is made of cells.
B
Gregor Mendel continued the genetic research of Thomas Hunt Morgan, but Mendel used pea plants.
C
Thomas Hunt Morgan continued the genetic research of Gregor Mendel, but Morgan used fruit flies.
D
The theory that everything is made of cells influenced Gregor Mendel in his research.

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