Question 1

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

Accepted Answer

A)  one 
B)  two 
C)  three 
D)  four 
E)  five 
A)  one 
B)  two 
C)  three 
D)  four 
E)  five B

Question 2

In a cross of Ff x Ff,the probability of having a dominant phenotype is

Accepted Answer

A)  1/4. 
B)  1/3. 
C)  1/2. 
D)  2/3. 
E)  3/4. 
A)  1/4. 
B)  1/3. 
C)  1/2. 
D)  2/3. 
E)  3/4. E

Question 3

Which of the following disorders is a trinucleotide repeat disorder?

Accepted Answer

A)  Marfan syndrome 
B)  sickle-cell disease 
C)  cystic fibrosis 
D)  Tay-Sachs disease 
E)  Huntington disease 
A)  Marfan syndrome 
B)  sickle-cell disease 
C)  cystic fibrosis 
D)  Tay-Sachs disease 
E)  Huntington disease E

Question 4

Which of the following traits would not be considered multifactorial?

Accepted Answer

A)  alcoholism 
B)  suicide risk 
C)  cleft lip/palate 
D)  diabetes 
E)  ABO blood type 
A)  alcoholism 
B)  suicide risk 
C)  cleft lip/palate 
D)  diabetes 
E)  ABO blood type

Question 5

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

Question 6

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 
A)  5 fingers 
B)  6 fingers

Question 7

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

Accepted Answer

A)  IAIA 
B)  IAIB 
C)  IAi 
D)  IBi 
E)  ii 
A)  IAIA 
B)  IAIB 
C)  IAi 
D)  IBi 
E)  ii

Question 8

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

Question 9

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)  AA 
A)  BB 
B)  Bb 
C)  AB 
D)  bb 
E)  AA

Question 10

A male receives his X linked alleles from his

Accepted Answer

A)  mother. 
B)  father. 
A)  mother. 
B)  father.

Question 11

Most of the sex-linked traits are found only on the X chromosome.

Accepted Answer

A) True 
 B)False

Question 12

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 ss 
A)  ff x ff 
B)  Gg x gg 
C)  AAbb x Aabb 
D)  AAbb x aaBB 
E)  Ss x ss

Question 13

The definition of a multifactorial trait is one in which more than one set of alleles is involved.

Accepted Answer

A) True 
 B)False

Question 14

Which of the following is not a characteristic of an autosomal dominant disorder pedigree?

Accepted Answer

A)  Affected children will usually have unaffected parents. 
B)  Heterozygotes are affected. 
C)  Two affected parents can produce an unaffected child. 
D)  Both males and females are affected with equal frequency. 
A)  Affected children will usually have unaffected parents. 
B)  Heterozygotes are affected. 
C)  Two affected parents can produce an unaffected child. 
D)  Both males and females are affected with equal frequency.

Question 15

If a person with type B blood marries a person with type A blood,what phenotypes can their children be?

Accepted Answer

A)  all type A 
B)  all type B 
C)  types A and O 
D)  types B and O 
E)  all 4 types 
A)  all type A 
B)  all type B 
C)  types A and O 
D)  types B and O 
E)  all 4 types

Question 16

Which of the following is a dominant allele?

Accepted Answer

A)  A 
B)  a 
C)  AA 
D)  ab 
E)  Ab 
A)  A 
B)  a 
C)  AA 
D)  ab 
E)  Ab

Question 17

Which of the following designations indicates a sex-linked trait?

Accepted Answer

A)  A 
B)  IA 
C)  XB 
D)  a 
E)  i 
A)  A 
B)  IA 
C)  XB 
D)  a 
E)  i

Question 18

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)  XBY 
A)  XBXB 
B)  XBXb 
C)  XbXb 
D)  XbY 
E)  XBY

Question 19

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. 
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.

Question 20

There is a single gene that controls the ability to taste PTC paper.The ability to taste is dominant to the inability to taste.If you can taste the paper,it is very bitter.Which of the following genotypes can taste the paper?

Accepted Answer

A)  only PP 
B)  both PP and Pp 
C)  both PP and pp 
D)  only Pp 
E)  only pp 
A)  only PP 
B)  both PP and Pp 
C)  both PP and pp 
D)  only Pp 
E)  only pp

Exam 20: Patterns of Genetic Inheritance

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

In a cross of Ff x Ff,the probability of having a dominant phenotype is

Which of the following disorders is a trinucleotide repeat disorder?

Which of the following traits would not be considered multifactorial?

In a pedigree,an affected male would be designated by

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?

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

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

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

A male receives his X linked alleles from his

Most of the sex-linked traits are found only on the X chromosome.

Which of the following represents a dihybrid cross?

The definition of a multifactorial trait is one in which more than one set of alleles is involved.

Which of the following is not a characteristic of an autosomal dominant disorder pedigree?

If a person with type B blood marries a person with type A blood,what phenotypes can their children be?

Which of the following is a dominant allele?

Which of the following designations indicates a sex-linked trait?

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

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

There is a single gene that controls the ability to taste PTC paper.The ability to taste is dominant to the inability to taste.If you can taste the paper,it is very bitter.Which of the following genotypes can taste the paper?

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