Question 1

Which of the following represents the genotype of a male who is color-blind?

Accepted Answer

A)   XBXB
B)   XBXb
C)   XbXb
D)   XbY
E)   XBYF) A) and E)
G) B) and D)

Question 2

Which of the following is a dominant allele?

Accepted Answer

A)   A
B)   a
C)   AA
D)   ab
E)   AbF) None of the above
G) A) and C)

Question 3

It is estimated that there are fewer than 100 genetic diseases caused by single gene mutations in humans.

Accepted Answer

A) True 
 B)False

Question 4

Which of the following traits/disorders is controlled by multiple genes?

Accepted Answer

A)   skin color
B)   Tay-Sachs disease
C)   ABO blood type
D)   familial hypercholesterolemia
E)   curly hairF) B) and E)
G) A) and E)

Question 5

Can a woman with an X-linked recessive disorder have normal sons?

Accepted Answer

A) True 
 B)False

Question 6

Clasp your hands together (without thinking about it) .Which thumb is on top every time you do this? The dominant phenotype is left thumb on top.If you have the genotype tt,which thumb is on top?

Accepted Answer

A)   left
B)   right
C)   left 50% of the time and right 50% of the time
D)   left 25% of the time and right 75% of the time
E)   left 75% of the time and right 25% of the timeF) B) and E)
G) C) and D)

Question 7

In an X-linked dominant trait,affected males pass the trait only to daughters.

Accepted Answer

A) True 
 B)False

Question 8

The square that is used to make all the possible combinations of gametes is called a Punnett square.

Accepted Answer

A) True 
 B)False

Question 9

There is a trait with two alleles.One allele codes for blue while the other allele codes for yellow.If this trait is inherited in a codominant manner,what color will the offspring most likely be?

Accepted Answer

A)   blue
B)   yellow
C)   green
D)   blue-and-yellow striped
E)   whiteF) B) and E)
G) A) and E)

Question 10

Which of the following represents a gamete with a dominant allele?

Accepted Answer

A)   A
B)   b
C)   AA
D)   Aa
E)   bbF) A) and D)
G) B) and E)

Question 11

Which of the following individuals has a recessive phenotype?

Accepted Answer

A)   AA
B)   Aa
C)   AaBb
D)   aabb
E)   aAbBF) A) and E)
G) A) and D)

Question 12

If the mother's genotype is aa,all of her eggs will be identical for this trait.

Accepted Answer

A) True 
 B)False

Question 13

Which of the following represents a dihybrid cross?

Accepted Answer

A)   ff x ff
B)   Gg x gg
C)   AAbb x Aabb
D)   AAbb x aaBB
E)   Ss x ssF) B) and C)
G) None of the above

Question 14

Unattached earlobes are a dominant trait in humans.Which phenotype does an individual with the genotype EE show?

Accepted Answer

A)   Both earlobes are unattached.
B)   Both earlobes are attached.
C)   The right earlobe is attached and the left earlobe is unattached.
D)   The right earlobe is unattached and the left earlobe is attached.
E)   Both earlobes are extremely elongated.F) A) and B)
G) B) and E)

Question 15

Dad has a genotype of AaBb.He can produce sperm with how many different genotypes?

Accepted Answer

A)   one
B)   two
C)   three
D)   four
E)   fiveF) A) and C)
G) C) and D)

Question 16

List the genotypic ratios of the cross between a man with O blood type and a woman with heterozygous B blood type.

Accepted Answer

The man's genotype is ii.The w...

Question 17

Which variable has the stronger influence on the color of an individual's skin?

Accepted Answer

A)   the individual's phenotype
B)   the amount of time spent in the sun
C)   the amount of time spent in the sun and the individual's genotype
D)   the individual's genotype
E)   Neither the sun nor the individual's genotype have any influence on the individual's skin color. Skin color is due to a combination of an individual's genotype as well as the environmental influence.F) A) and B)
G) All of the above

Question 18

If an individual has the A blood type,how many different genotypes can they possess?

Accepted Answer

A)   one
B)   two
C)   three
D)   four
E)   fiveF) C) and D)
G) None of the above

Question 19

Which of the following traits is an X-linked recessive disorder?

Accepted Answer

A)   color blindness
B)   Tay-Sachs
C)   cystic fibrosis
D)   sickle-cell disease
E)   Marfan syndromeF) A) and B)
G) B) and C)

Question 20

A male inherits his X-linked allele from his mother.

Accepted Answer

A) True 
 B)False

Exam 21: Patterns of Genetic Inheritance

Which variable has the stronger influence on the color of an individual's skin?

Correct AnswerverifiedShow Answer

If the mother's genotype is aa,all of her eggs will be identical for this trait.

Correct AnswerverifiedShow Answer

Clasp your hands together (without thinking about it) .Which thumb is on top every time you do this? The dominant phenotype is left thumb on top.If you have the genotype tt,which thumb is on top?

Correct AnswerverifiedShow Answer

Can a woman with an X-linked recessive disorder have normal sons?

Correct AnswerverifiedShow Answer

A male inherits his X-linked allele from his mother.

Correct AnswerverifiedShow Answer

Which of the following traits/disorders is controlled by multiple genes?

Correct AnswerverifiedShow Answer

Which of the following is a dominant allele?

Correct AnswerverifiedShow Answer

Unattached earlobes are a dominant trait in humans.Which phenotype does an individual with the genotype EE show?

Correct AnswerverifiedShow Answer

Which of the following represents a dihybrid cross?

Correct AnswerverifiedShow Answer

Which of the following represents the genotype of a male who is color-blind?

Correct AnswerverifiedShow Answer

Which of the following individuals has a recessive phenotype?

Correct AnswerverifiedShow Answer

There is a trait with two alleles.One allele codes for blue while the other allele codes for yellow.If this trait is inherited in a codominant manner,what color will the offspring most likely be?

Correct AnswerverifiedShow Answer

If an individual has the A blood type,how many different genotypes can they possess?

Correct AnswerverifiedShow Answer

It is estimated that there are fewer than 100 genetic diseases caused by single gene mutations in humans.

Correct AnswerverifiedShow Answer

The square that is used to make all the possible combinations of gametes is called a Punnett square.

Correct AnswerverifiedShow Answer

Which of the following traits is an X-linked recessive disorder?

Correct AnswerverifiedShow Answer

Which of the following represents a gamete with a dominant allele?

Correct AnswerverifiedShow Answer

Dad has a genotype of AaBb.He can produce sperm with how many different genotypes?

Correct AnswerverifiedShow Answer

In an X-linked dominant trait,affected males pass the trait only to daughters.

Correct AnswerverifiedShow Answer

List the genotypic ratios of the cross between a man with O blood type and a woman with heterozygous B blood type.

Correct AnswerverifiedThe man's genotype is ii.The w...View AnswerShow Answer

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The man's genotype is ii.The w...
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