Question 1

How is familial hypercholesterolemia inherited?

Accepted Answer

A)  autosomal recessive 
B)  autosomal dominant 
C)  incompletely dominant 
D)  codominant 
E)  sex-linked dominant 
A)  autosomal recessive 
B)  autosomal dominant 
C)  incompletely dominant 
D)  codominant 
E)  sex-linked dominant

Question 2

Unattached earlobes are a dominant trait in humans. Which phenotype is most likely for an individual with the genotype EE?

Accepted Answer

A)  both earlobes are unattached 
B)  both earlobes are attach 
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 
A)  both earlobes are unattached 
B)  both earlobes are attach 
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

Question 3

Dad has a genotype of AaBb. How many different kinds of sperm can he produce?

Accepted Answer

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

Question 4

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 time 
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 time

Question 5

When you describe a person as having attached ear lobes, you are describing their genotype.

Accepted Answer

A) True 
 B)False

Question 6

A male inherits his X linked allele from his mother.

Accepted Answer

A) True 
 B)False

Question 7

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 8

Which of the following terms refers to the genes of an individual?

Accepted Answer

A)  genotype 
B)  phenotype 
C)  gamete 
D)  probability 
E)  autosomal 
A)  genotype 
B)  phenotype 
C)  gamete 
D)  probability 
E)  autosomal

Question 9

Describe what is meant by a polygenic traits.

Accepted Answer

Polygenic traits are governed by several

Question 10

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.

Question 11

Is it possible for a man with type O blood to be the father of a child with type A blood?

Accepted Answer

The answer of Is it possible for a man with...

Question 12

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 13

In a cross of Ss x Ss, the probability of having a heterozygous genotype 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.

Question 14

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 15

While a locus refers to a unit of heredity, a gene refers to a specific position on a chromosome.

Accepted Answer

A) True 
 B)False

Question 16

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

Question 17

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)  types A, B, O, and AB 
A)  all type A 
B)  all type B 
C)  types A and O 
D)  types B and O 
E)  types A, B, O, and AB

Question 18

When describing someone as "lactose intolerant", you are describing their

Accepted Answer

A)  genotype. 
B)  phenotype. 
C)  alleles. 
D)  genome. 
E)  none of these 
A)  genotype. 
B)  phenotype. 
C)  alleles. 
D)  genome. 
E)  none of these

Question 19

Which of the following is not an autosomal recessive disorder?

Accepted Answer

A)  Marfan syndrome 
B)  Tay-Sachs disease 
C)  cystic fibrosis 
D)  sickle cell disease 
E)  all are autosomal recessive disorders 
A)  Marfan syndrome 
B)  Tay-Sachs disease 
C)  cystic fibrosis 
D)  sickle cell disease 
E)  all are autosomal recessive disorders

Question 20

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

Accepted Answer

The answer of Can two parents that have a genetic...

Exam 20: Patterns of Genetic Inheritance

How is familial hypercholesterolemia inherited?

Unattached earlobes are a dominant trait in humans. Which phenotype is most likely for an individual with the genotype EE?

Dad has a genotype of AaBb. How many different kinds of sperm can he produce?

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?

When you describe a person as having attached ear lobes, you are describing their genotype.

A male inherits his X linked allele from his mother.

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

Which of the following terms refers to the genes of an individual?

Describe what is meant by a polygenic traits.

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

Is it possible for a man with type O blood to be the father of a child with type A blood?

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

In a cross of Ss x Ss, the probability of having a heterozygous genotype is

In a pedigree, an affected male would be designated by

While a locus refers to a unit of heredity, a gene refers to a specific position on a chromosome.

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?

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

When describing someone as "lactose intolerant", you are describing their

Which of the following is not an autosomal recessive disorder?

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

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