Question 1

A human cell that has 69 chromosomes is

Accepted Answer

A)  aneuploid.
B)  triploid.
C)  diploid.
D)  euploid.E) All of the above
F) None of the above

Question 2

In von Willebrand disease, which is either autosomal recessive or autosomal dominant, clotting time slows and the person bruises and bleeds easily. Not everyone who inherits the disease genotype actually develops the phenotype. Affected individuals have differing degrees of difficulty in blood clotting. This condition is

Accepted Answer

A)  completely penetrant, variably expressive, and not genetically heterogeneic.
B)  incompletely penetrant, variably expressive, and genetically heterogeneic.
C)  completely penetrant, invariably expressive, and not genetically heterogeneic.
D)  pleiotropic and genetically heterogeneic.E) None of the above
F) C) and D)

Question 3

A woman wishes to have her unborn child tested for genetic disorders and see a full karyotype of her child's genome but does not want to have the amniotic sac punctured to retrieve samples. Which of the following tests will give the most accurate and thorough examination of the fetal genome without puncturing the amniotic sac to retrieve fetal DNA?

Accepted Answer

A)  Amniocentesis
B)  Chorionic villus sampling
C)  Ultrasonography
D)  Maternal serum marker screeningE) B) and D)
F) C) and D)

Question 4

The human genome contains millions of different genes.

Accepted Answer

A) True 
 B)False

Question 5

Antonio is colorblind. His partner Emilia is not colorblind nor is she a carrier (heterozygote) for colorblindness. The offspring of this couple would

Accepted Answer

A)  be sons with colorblindness and daughters with color vision.
B)  be colorblind daughters and sons with normal color vision.
C)  all be colorblind.
D)  all have normal color vision.E) A) and C)
F) A) and D)

Question 6

Absence of the SRY gene and expression of the Wnt4 gene are necessary for female reproductive structures to develop in an embryo and fetus.

Accepted Answer

A) True 
 B)False  True

Question 7

An example of a sex-influenced trait is

Accepted Answer

A)  baldness.
B)  hemophilia.
C)  colorblindness.
D)  hypertension.E) B) and C)
F) A) and B)

Question 8

A couple is trying to calculate the chance of genetic traits in their potential offspring. From family history, the man presumes he is heterozygous for the height gene via the "tall" allele (T) . His partner is short in stature, so she believes she is homozygous for the height gene via the "short" allele (t) . Assuming the "tall" allele is completely dominant, what is the chance that their offspring would be tall in stature?

Accepted Answer

A)  25%
B)  50%
C)  75%
D)  100%E) B) and D)
F) A) and B)

Question 9

The origin of the 46 chromosomes in a human zygote is

Accepted Answer

A)  all from the sperm cell.
B)  half from DNA and half from RNA.
C)  half from the sperm and half from the egg.
D)  all from the egg.E) All of the above
F) None of the above C

Question 10

An offspring of parents whose genotypes are Aa and Aa may be

Accepted Answer

A)  only Aa.
B)  AA or aa.
C)  AA, Aa, or aa.
D)  only aa.E) A) and C)
F) All of the above

Question 11

A karyotype is

Accepted Answer

A)  a diagram that represents family relationships.
B)  a size-ordered chart of chromosomes.
C)  a genome sequence.
D)  a website that lists genes and the proteins they encode.E) C) and D)
F) A) and B)

Question 12

The nuances of eye color arise from

Accepted Answer

A)  the numbers of rods and cones in the retina.
B)  the way pigments are deposited in the iris.
C)  how much vitamin A is in a person's diet.
D)  multiple alleles of at least 10 genes.E) A) and B)
F) A) and C)

Question 13

Gametes pass genetic information from generation to generation.

Accepted Answer

A) True 
 B)False

Question 14

The genotypes and phenotypes that result from the cross of Aa and Aa (A = normal pigmentation and a = albinism) are

Accepted Answer

A)  phenotypes:75% normal and 25% albino; genotypes:25% homozygous dominant and 50% heterozygous and 25% homozygous recessive.
B)  phenotypes:50% normal and 50% albino; genotypes:all homozygous recessive.
C)  phenotypes:50% normal and 50% albino; genotypes:50% homozygous recessive and 50% homozygous dominant.
D)  phenotypes:25% normal and 75% albino; genotypes:25% homozygous dominant and 50% heterozygous and 25% homozygous recessive.E) A) and D)
F) C) and D)

Question 15

Most of the DNA in the human genome encodes protein.

Accepted Answer

A) True 
 B)False

Question 16

How alike are our genomes?

Accepted Answer

A)  About 10%
B)  About 25%
C)  About 75%
D)  Nearly 100%E) C) and D)
F) None of the above

Question 17

The genotypes and phenotypes that result from a cross of AA and Aa (A = normal pigmentation and a = albinism) are

Accepted Answer

A)  phenotypes:all normal; genotypes:50% homozygous dominant and 50% heterozygous.
B)  phenotypes:50% normal and 50% albino; genotypes:all heterozygous.
C)  phenotypes:75% normal and 25% albino; genotypes:75% heterozygous and 25% homozygous.
D)  phenotypes:all albino; genotypes:50% heterozygous and 50% homozygous recessive.E) A) and C)
F) B) and D) A

Question 18

We can predict the likelihood of a particular inherited trait occurring in a particular family member by consulting the ways that genes are transmitted on chromosomes.

Accepted Answer

A) True 
 B)False

Question 19

After receiving a karyotype of a fetus, it is discovered that it has Klinefelter's syndrome. What does this designation indicate?

Accepted Answer

A)  The fetus is female and resulted from one of the gametes having an extra X chromosome.
B)  The fetus is an XY male.
C)  The fetus is male and the result of a Y-bearing sperm fertilizing an XX egg.
D)  The fetus is female and the result of only one gamete possessing an X chromosome.E) A) and B)
F) B) and D)

Question 20

In genomic imprinting, the sex of a parent transmitting an allele is important in the phenotype of the offspring.

Accepted Answer

A) True 
 B)False

Exam 24: Genetics and Genomics

A human cell that has 69 chromosomes is

Correct Answer
verified

Correct Answer
verified

Correct Answer
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The human genome contains millions of different genes.

Correct Answer
verified

Antonio is colorblind. His partner Emilia is not colorblind nor is she a carrier (heterozygote) for colorblindness. The offspring of this couple would

Correct Answer
verified

Absence of the SRY gene and expression of the Wnt4 gene are necessary for female reproductive structures to develop in an embryo and fetus.

Correct Answer
verified
True

An example of a sex-influenced trait is

Correct Answer
verified

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The origin of the 46 chromosomes in a human zygote is

Correct Answer
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C

An offspring of parents whose genotypes are Aa and Aa may be

Correct Answer
verified

A karyotype is

Correct Answer
verified

The nuances of eye color arise from

Correct Answer
verified

Gametes pass genetic information from generation to generation.

Correct Answer
verified

The genotypes and phenotypes that result from the cross of Aa and Aa (A = normal pigmentation and a = albinism) are

Correct Answer
verified

Most of the DNA in the human genome encodes protein.

Correct Answer
verified

How alike are our genomes?

Correct Answer
verified

The genotypes and phenotypes that result from a cross of AA and Aa (A = normal pigmentation and a = albinism) are

Correct Answer
verified
A

We can predict the likelihood of a particular inherited trait occurring in a particular family member by consulting the ways that genes are transmitted on chromosomes.

Correct Answer
verified

After receiving a karyotype of a fetus, it is discovered that it has Klinefelter's syndrome. What does this designation indicate?

Correct Answer
verified

In genomic imprinting, the sex of a parent transmitting an allele is important in the phenotype of the offspring.

Correct Answer
verified

Exam 24: Genetics and Genomics

A human cell that has 69 chromosomes is

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

The human genome contains millions of different genes.

Correct AnswerverifiedShow Answer

Antonio is colorblind. His partner Emilia is not colorblind nor is she a carrier (heterozygote) for colorblindness. The offspring of this couple would

Correct AnswerverifiedShow Answer

Absence of the SRY gene and expression of the Wnt4 gene are necessary for female reproductive structures to develop in an embryo and fetus.

Correct AnswerverifiedTrue

An example of a sex-influenced trait is

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

The origin of the 46 chromosomes in a human zygote is

Correct AnswerverifiedC

An offspring of parents whose genotypes are Aa and Aa may be

Correct AnswerverifiedShow Answer

A karyotype is

Correct AnswerverifiedShow Answer

The nuances of eye color arise from

Correct AnswerverifiedShow Answer

Gametes pass genetic information from generation to generation.

Correct AnswerverifiedShow Answer

The genotypes and phenotypes that result from the cross of Aa and Aa (A = normal pigmentation and a = albinism) are

Correct AnswerverifiedShow Answer

Most of the DNA in the human genome encodes protein.

Correct AnswerverifiedShow Answer

How alike are our genomes?

Correct AnswerverifiedShow Answer

The genotypes and phenotypes that result from a cross of AA and Aa (A = normal pigmentation and a = albinism) are

Correct AnswerverifiedA

We can predict the likelihood of a particular inherited trait occurring in a particular family member by consulting the ways that genes are transmitted on chromosomes.

Correct AnswerverifiedShow Answer

After receiving a karyotype of a fetus, it is discovered that it has Klinefelter's syndrome. What does this designation indicate?

Correct AnswerverifiedShow Answer

In genomic imprinting, the sex of a parent transmitting an allele is important in the phenotype of the offspring.

Correct AnswerverifiedShow Answer

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True

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C

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A

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