Question 1

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 E)
G) A) and C) A

Question 2

What is the genotype of a person with type O blood?

Accepted Answer

A)  IAIA
B)  IAIB
C)  IAi
D)  IBi
E)  iiF) C) and E)
G) None of the above

Question 3

If two parents who are unaffected have a child that is affected,then the parents are both considered bearers.

Accepted Answer

A) True 
 B)False  False

Question 4

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) B) and C)
G) A) and E)

Question 5

Which of the following is not a characteristic of an X-linked recessive disorder pedigree?

Accepted Answer

A)  An affected son can have normal parents.
B)  If a female has the trait,her father must also have it.
C)  The characteristic often skips a generation.
D)  More females than males are affecteD.
E)  If a woman has the characteristic,all of her sons will have it.F) A) and D)
G) A) and B)

Question 6

Describe what is meant by a polygenic traits.

Accepted Answer

Polygenic traits are governed by several...

Question 7

In a cross of a homozygous dominant parent and a homozygous recessive parent,what is the ratio of offspring that will exhibit the recessive phenotype?

Accepted Answer

A)  0.
B)  1/4.
C)  1/2.
D)  3/4.
E)  1.F) C) and D)
G) D) and E)

Question 8

Explain the problems associated with the genetic disorder Tay-Sachs.A.This lysosome is responsible for clearing out the fatty acid proteins that build up in the cells of the brain.The build up begins to interfere with proper brain development and growth.This leads to malfunctions in vision,movement,hearing,and overall mental development.The impairment leads to blindness,seizures,and paralysis.

Accepted Answer

Affected children w...

Question 9

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) None of the above
G) A) and C)

Question 10

Can two parents that have a genetic disorder ever have a normal child?

Accepted Answer

Yes,if they are het...

Question 11

Which of the following is an example of a recessive genotype?

Accepted Answer

A)  aa
B)  Aa
C)  short
D)  AA
E)  abF) A) and B)
G) A) and E)

Question 12

If a mother is a carrier for color-blindness and her husband is not,which of the following children are most likely?

Accepted Answer

A)  1 normal daughter,1 carrier daughter,1 normal son,and 1 color-blind son
B)  2 normal daughters,1 normal son,and 1 color-blind son
C)  2 carrier daughters,1 normal son,and 1 color-blind son
D)  1 normal daughter,1 carrier daughter,and 2 normal sons
E)  1 normal daughter,1 carrier daughter,and 2 color-blind sonsF) B) and C)
G) None of the above

Question 13

An allele is to a gene,as a locus is to a

Accepted Answer

A)  gamete.
B)  phenotype.
C)  chromosome.
D)  genotype.
E)  unit of heredity.F) D) and E)
G) C) and D)

Question 14

In a dihybrid cross,if the resulting ratios are 1:1:1:1,what are the genotypes of the parents?

Accepted Answer

A)  GgRr x ggrr
B)  GGRR x ggrr
C)  GgRr x GgRr
D)  Gg x Rr
E)  GG x RRF) A) and B)
G) B) and E)

Question 15

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 16

There are two different alleles for the number of fingers on the hands: 5 finger allele and 6 finger allele.When both the 5 finger allele and the 6 finger allele are present in the same individual,the individual has 6 fingers on the hands.Which allele is dominant?

Accepted Answer

A)  5 fingers
B)  6 fingers
C)  1 finger
D)  11 fingers
E)  7 fingersF) A) and C)
G) A) and E)

Question 17

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) C) and D)
G) B) and D)

Question 18

In a pedigree,an affected male would be designated by

Accepted Answer

A)  an open circle.
B)  a shaded circle.
C)  an open square.
D)  a shaded square.
E)  a square with a line through it.F) C) and D)
G) A) and B)

Question 19

How are Fragile X syndrome and Huntington disease similar?

Accepted Answer

A)  Both exhibit a late onset in life.
B)  Both are trinucleotide repeat expansion disorders.
C)  Both affect the muscles and lead to eventual paralysis.
D)  Both cause autism.
E)  Both are found only in males.F) A) and B)
G) None of the above

Question 20

Which of the following would not be a possible way to list someone's genotype?

Accepted Answer

A)  BB
B)  Bb
C)  AB
D)  bb
E)  AAF) A) and D)
G) A) and E) C

Exam 21: Patterns of Genetic Inheritance

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

Correct Answer
verified
A

What is the genotype of a person with type O blood?

Correct Answer
verified

If two parents who are unaffected have a child that is affected,then the parents are both considered bearers.

Correct Answer
verified
False

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

Correct Answer
verified

Which of the following is not a characteristic of an X-linked recessive disorder pedigree?

Correct Answer
verified

Describe what is meant by a polygenic traits.

Correct Answer
verified
Polygenic traits are governed by several...
View Answer

In a cross of a homozygous dominant parent and a homozygous recessive parent,what is the ratio of offspring that will exhibit the recessive phenotype?

Correct Answer
verified

Correct Answer
verified
Affected children w...
View Answer

Which of the following represents a dihybrid cross?

Correct Answer
verified

Can two parents that have a genetic disorder ever have a normal child?

Correct Answer
verified
Yes,if they are het...
View Answer

Which of the following is an example of a recessive genotype?

Correct Answer
verified

If a mother is a carrier for color-blindness and her husband is not,which of the following children are most likely?

Correct Answer
verified

An allele is to a gene,as a locus is to a

Correct Answer
verified

In a dihybrid cross,if the resulting ratios are 1:1:1:1,what are the genotypes of the parents?

Correct Answer
verified

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

Correct Answer
verified

There are two different alleles for the number of fingers on the hands: 5 finger allele and 6 finger allele.When both the 5 finger allele and the 6 finger allele are present in the same individual,the individual has 6 fingers on the hands.Which allele is dominant?

Correct Answer
verified

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 Answer
verified

In a pedigree,an affected male would be designated by

Correct Answer
verified

How are Fragile X syndrome and Huntington disease similar?

Correct Answer
verified

Which of the following would not be a possible way to list someone's genotype?

Correct Answer
verified
C

Exam 21: Patterns of Genetic Inheritance

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

Correct AnswerverifiedA

What is the genotype of a person with type O blood?

Correct AnswerverifiedShow Answer

If two parents who are unaffected have a child that is affected,then the parents are both considered bearers.

Correct AnswerverifiedFalse

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

Correct AnswerverifiedShow Answer

Which of the following is not a characteristic of an X-linked recessive disorder pedigree?

Correct AnswerverifiedShow Answer

Describe what is meant by a polygenic traits.

Correct AnswerverifiedPolygenic traits are governed by several...View AnswerShow Answer

In a cross of a homozygous dominant parent and a homozygous recessive parent,what is the ratio of offspring that will exhibit the recessive phenotype?

Correct AnswerverifiedShow Answer

Correct Answerverified Affected children w...View AnswerShow Answer

Which of the following represents a dihybrid cross?

Correct AnswerverifiedShow Answer

Can two parents that have a genetic disorder ever have a normal child?

Correct Answerverified Yes,if they are het...View AnswerShow Answer

Which of the following is an example of a recessive genotype?

Correct AnswerverifiedShow Answer

If a mother is a carrier for color-blindness and her husband is not,which of the following children are most likely?

Correct AnswerverifiedShow Answer

An allele is to a gene,as a locus is to a

Correct AnswerverifiedShow Answer

In a dihybrid cross,if the resulting ratios are 1:1:1:1,what are the genotypes of the parents?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

There are two different alleles for the number of fingers on the hands: 5 finger allele and 6 finger allele.When both the 5 finger allele and the 6 finger allele are present in the same individual,the individual has 6 fingers on the hands.Which allele is dominant?

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

In a pedigree,an affected male would be designated by

Correct AnswerverifiedShow Answer

How are Fragile X syndrome and Huntington disease similar?

Correct AnswerverifiedShow Answer

Which of the following would not be a possible way to list someone's genotype?

Correct AnswerverifiedC

Correct Answer
verified
A

Correct Answer
verified

Correct Answer
verified
False

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
Polygenic traits are governed by several...
View Answer

Correct Answer
verified

Correct Answer
verified
Affected children w...
View Answer

Correct Answer
verified

Correct Answer
verified
Yes,if they are het...
View Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
C