Question 1

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

Accepted Answer

Yes,if the mother h

Question 2

Julie has a genetic disorder.Julie and her husband,Shane,have three children,none of which have the genetic disorder.How is this disorder most likely inherited?

Accepted Answer

A) autosomal dominant. 
B) autosomal recessive. 
C) heterozygous dominant. 
D) The environment influences the trait instead of the genetics. 
E) 100% inheritance from the father since the children are not affected. 
A) autosomal dominant. 
B) autosomal recessive. 
C) heterozygous dominant. 
D) The environment influences the trait instead of the genetics. 
E) 100% inheritance from the father since the children are not affected.

Question 3

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 4

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 5

Which of the following disorders is caused by a defect in the production of an elastic connective tissue protein called fibrillin?

Accepted Answer

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

Question 6

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

Accepted Answer

A) Heterozygotes have an affected phenotype. 
B) Affected children can have unaffected parents. 
C) Two affected parents will always have affected children. 
D) Both males and females are affected with equal frequency. 
E) Affected individuals with homozygous unaffected mates will have unaffected children. 
A) Heterozygotes have an affected phenotype. 
B) Affected children can have unaffected parents. 
C) Two affected parents will always have affected children. 
D) Both males and females are affected with equal frequency. 
E) Affected individuals with homozygous unaffected mates will have unaffected children.

Question 7

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

Accepted Answer

No,all of her sons

Question 8

Which of the following genotypes is heterozygous?

Accepted Answer

A) Aa 
B) Ab 
C) aB 
D) ab 
E) aa 
A) Aa 
B) Ab 
C) aB 
D) ab 
E) aa

Question 9

Which of the following represents a cross to determine if an individual is homozygous or heterozygous dominant?

Accepted Answer

A) Aa x aa 
B) AA x AA 
C) aa x aa 
D) Aa x AA 
E) Aa x Aa 
A) Aa x aa 
B) AA x AA 
C) aa x aa 
D) Aa x AA 
E) Aa x Aa

Question 10

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

Accepted Answer

Man's genotype is ii.The woman

Question 11

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. 
E) Two unaffected parents will not have affected children. 
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. 
E) Two unaffected parents will not have affected children.

Question 12

Of the three possible alleles for the ABO blood type,each individual can have how many?

Accepted Answer

A) one 
B) two 
C) three 
D) none 
E) half an allele 
A) one 
B) two 
C) three 
D) none 
E) half an allele

Question 13

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

Question 14

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 15

The definition of a multifactorial trait is one in which more than one set of alleles is involved in which the environment plays no role.

Accepted Answer

A) True 
 B)False

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

Even though sickle-cell disease is inherited as an autosomal recessive disorder,the heterozygote can express some variation of the recessive phenotype.

Accepted Answer

A) True 
 B)False

Question 18

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

Question 19

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 20

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

Accepted Answer

A) True 
 B)False

Exam 21: Patterns of Genetic Inheritance

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

Julie has a genetic disorder.Julie and her husband,Shane,have three children,none of which have the genetic disorder.How is this disorder most likely inherited?

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

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

Which of the following disorders is caused by a defect in the production of an elastic connective tissue protein called fibrillin?

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

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

Which of the following genotypes is heterozygous?

Which of the following represents a cross to determine if an individual is homozygous or heterozygous dominant?

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

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

Of the three possible alleles for the ABO blood type,each individual can have how many?

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

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

The definition of a multifactorial trait is one in which more than one set of alleles is involved in which the environment plays no role.

Which of the following is a dominant allele?

Even though sickle-cell disease is inherited as an autosomal recessive disorder,the heterozygote can express some variation of the recessive phenotype.

Which of the following disorders is a trinucleotide repeat disorder?

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

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

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