Question 1

Which of the following is NOT a characteristic of an autosomal recessive trait?

Accepted Answer

A)   All of the children of two affected individuals are affected.
B)   If two individuals are heterozygous, the risk of having an affected child is 1:4.
C)   For rare traits, affected individuals have unaffected parents.
D)   Every affected individual has at least one affected parent.
E)   All of these are characteristic of an autosomal recessive trait.F) A) and B)
G) B) and E)

Question 2

The gene that codes for the connective tissue protein fibrillin is the gene that causes ____________________.

Accepted Answer

The answer of The gene that codes for the connective...

Question 3

The gene responsible for Marfan syndrome encodes a protein associated with

Accepted Answer

A)   heart muscle.
B)   connective tissue.
C)   fat tissue.
D)   red blood cells.
E)   nervous tissues.F) B) and D)
G) A) and B) B

Question 4

A defective form of the protein dystrophin is involved in the diseases __________ and ________.

Accepted Answer

Duchenne muscular dy...

Question 5

How would you distinguish between a trait that is X-linked dominant trait and one that is autosomal dominant?

Accepted Answer

To distinguish between an X-linked domin...

Question 6

Two phenotypically normal parents have six children. Two daughters and two sons have the same genetic disease. This would be the expected situation for

Accepted Answer

A)   hemophilia.
B)   cystic fibrosis.
C)   Marfan syndrome.
D)   hypophosphatemia.
E)   all of these.F) D) and E)
G) A) and B)

Question 7

Color blindness only occurs in males.

Accepted Answer

A) True 
 B)False

Question 8

Approximately how many Y-linked genes have been discovered?

Accepted Answer

A)   None
B)   10
C)   36
D)   100
E)   300F) C) and E)
G) C) and D)

Question 9

Duchenne muscular dystrophy and Becker's muscular dystrophy represent allelic forms of the same X-linked gene.

Accepted Answer

A) True 
 B)False

Question 10

Hemophilia was a significant issue in the life of

Accepted Answer

A)   Abraham Lincoln.
B)   Olympic volleyball star Flo Hyman.
C)   Noah.
D)   the family of the last tsar of Russia.
E)   King George III of England.F) C) and D)
G) A) and B)

Question 11

The underlying problem with cystic fibrosis is

Accepted Answer

A)   the inability to transport chloride ions.
B)   mutations in the hemoglobin molecule.
C)   defective ganglioside molecules.
D)   the inability to metabolize certain amino acids.
E)   abnormal fat deposits around the heart.F) A) and D)
G) C) and E)

Question 12

Human traits are controlled only by the genetic material found in the 46 chromosomes.

Accepted Answer

A) True 
 B)False

Question 13

Mendel's laws apply to all sexually reproducing organisms. Therefore, the basic methods of genetic analysis in humans and other organisms is the same.

Accepted Answer

A) True 
 B)False

Question 14

The analysis of a pedigree is complete when the information in the pedigree supports the hypothesis formed by the geneticist.

Accepted Answer

A) True 
 B)False

Question 15

Is it easier to work out pedigrees for dominant traits than for recessive ones? What can complicate the analysis of dominant traits?

Accepted Answer

Working out pedigrees for dominant trait...

Question 16

Valeria has a serious disorder called fragile X syndrome and her brother does not have the disorder. Her mother does not have the disorder but her father does. What is the most likely inheritance pattern for fragile X syndrome?

Accepted Answer

A)   Autosomal dominant
B)   Autosomal recessive
C)   X-linked dominant
D)   X-linked recessive
E)   Y-linked recessiveF) A) and B)
G) A) and C)

Question 17

The main problem for sufferers of cystic fibrosis is

Accepted Answer

A)   abnormal hemoglobin.
B)   elevated levels of cholesterol.
C)   mucus blocking ducts of glands.
D)   missing DNA repair enzymes.
E)   formation of cysts in kidneys.F) A) and E)
G) None of the above C

Question 18

Which of the following is NOT a symptom of Marfan syndrome?

Accepted Answer

A)   Vision problems
B)   Blood vessel defects
C)   Loose joints
D)   Short stature
E)   All of these are symptoms of Marfan syndromeF) A) and D)
G) C) and D) D

Question 19

Mitochondrial gene defects mainly cause myopathies (conditions affecting ____________________), and encephalomyopathies (conditions also affecting ____________________).

Accepted Answer

The answer of Mitochondrial gene defects mainly cause myopathies (conditions...

Question 20

Adults who have children who have died from lethal recessive disorders are most likely ____________________.

Accepted Answer

The answer of Adults who have children who have died...

Exam 4: Pedigree Analysis in Human Genetics

Which of the following is NOT a characteristic of an autosomal recessive trait?

Correct AnswerverifiedShow Answer

The gene that codes for the connective tissue protein fibrillin is the gene that causes ____________________.

Correct AnswerverifiedShow Answer

The gene responsible for Marfan syndrome encodes a protein associated with

Correct AnswerverifiedB

A defective form of the protein dystrophin is involved in the diseases __________ and ________.

Correct AnswerverifiedDuchenne muscular dy...View AnswerShow Answer

How would you distinguish between a trait that is X-linked dominant trait and one that is autosomal dominant?

Correct AnswerAnswered by ExamLex AITo distinguish between an X-linked domin...View AnswerShow Answer

Two phenotypically normal parents have six children. Two daughters and two sons have the same genetic disease. This would be the expected situation for

Correct AnswerverifiedShow Answer

Color blindness only occurs in males.

Correct AnswerverifiedShow Answer

Approximately how many Y-linked genes have been discovered?

Correct AnswerverifiedShow Answer

Duchenne muscular dystrophy and Becker's muscular dystrophy represent allelic forms of the same X-linked gene.

Correct AnswerverifiedShow Answer

Hemophilia was a significant issue in the life of

Correct AnswerverifiedShow Answer

The underlying problem with cystic fibrosis is

Correct AnswerverifiedShow Answer

Human traits are controlled only by the genetic material found in the 46 chromosomes.

Correct AnswerverifiedShow Answer

Mendel's laws apply to all sexually reproducing organisms. Therefore, the basic methods of genetic analysis in humans and other organisms is the same.

Correct AnswerverifiedShow Answer

The analysis of a pedigree is complete when the information in the pedigree supports the hypothesis formed by the geneticist.

Correct AnswerverifiedShow Answer

Is it easier to work out pedigrees for dominant traits than for recessive ones? What can complicate the analysis of dominant traits?

Correct AnswerAnswered by ExamLex AIWorking out pedigrees for dominant trait...View AnswerShow Answer

Valeria has a serious disorder called fragile X syndrome and her brother does not have the disorder. Her mother does not have the disorder but her father does. What is the most likely inheritance pattern for fragile X syndrome?

Correct AnswerverifiedShow Answer

The main problem for sufferers of cystic fibrosis is

Correct AnswerverifiedC

Which of the following is NOT a symptom of Marfan syndrome?

Correct AnswerverifiedD

Mitochondrial gene defects mainly cause myopathies (conditions affecting ____________________), and encephalomyopathies (conditions also affecting ____________________).

Correct AnswerverifiedShow Answer

Adults who have children who have died from lethal recessive disorders are most likely ____________________.

Correct AnswerverifiedShow Answer

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B

A defective form of the protein dystrophin is involved in the diseases __ and .

Correct Answer
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Duchenne muscular dy...
View Answer

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Answered by ExamLex AI
To distinguish between an X-linked domin...
View Answer

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Answered by ExamLex AI
Working out pedigrees for dominant trait...
View Answer

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C

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D

Mitochondrial gene defects mainly cause myopathies (conditions affecting ), and encephalomyopathies (conditions also affecting ).

Correct Answer
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Correct Answer
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