Question 1

Hakeem,given up for adoption as an infant,has red-green color blindness.Is this fact useful in helping him to track down his biological father? Explain.

Accepted Answer

This condition is sex-linked and,since Hakeem is a male,means that he inherited the trait from his mother.Thus,he will need to find something else to narrow the field in his search for his biological dad.

Question 2

If Hani has type A blood and his mother has type B blood,which of the following is the most likely genotype of Hani's father?

Accepted Answer

A) IBIB 
B) IBi 
C) ii 
D) IAIA 
A) IBIB 
B) IBi 
C) ii 
D) IAIA D

Question 3

Why are pedigrees useful to track genetic disorders?

Accepted Answer

Pedigrees can be used to track genetic disorders within families.Individuals with hemophilia can trace the inheritance of these genes back through their family heritage in order to identify the source of the trait.Genetically,these family trees of inheritance can be used to determine the exact generation in which a disorder appears or which individual may have been a carrier for the disorder and whether a couple should risk having a child with a particular trait.

Question 4

Adel has freckles,autosomal dominant,so please provide her genotype.

Accepted Answer

A) FF 
B) Ff 
C) ff 
D) Can't say for certain it could be FF or Ff. 
A) FF 
B) Ff 
C) ff 
D) Can't say for certain it could be FF or Ff.

Question 5

The gene for Tay-Sachs disease codes for a nonfunctional form of the enzyme hexosaminidase A (or Hex A). It has been found that a person with only one-third the maximum amount of Hex A can function absolutely normally. Please characterize the heredity of Tay-Sachs disease.

Accepted Answer

A) codominant 
B) recessive 
C) dominant 
D) multiple allelic 
A) codominant 
B) recessive 
C) dominant 
D) multiple allelic

Question 6

Babies were accidentally switched at the hospital! Mr.and Mrs.Fire both have type O blood.Which of the following four babies of the same age is most likely the Fire child?

Accepted Answer

A) baby with type A 
B) baby with type B 
C) baby with type AB 
D) baby with type O 
A) baby with type A 
B) baby with type B 
C) baby with type AB 
D) baby with type O

Question 7

What are the ethical and legal issues involved with gene testing?

Accepted Answer

Gene testing is a double-edged sword in

Question 8

Match each definition in the first column to the correct term in the second column.
-This is what chromosomes other than X and Y are called.

Accepted Answer

A) Autosomes 
B) Phenotype 
C) Incomplete dominance 
D) Duplication 
E) Heterozygous
F)Codominance
G)Linkage
H)Pedigree
I)Gene
J)Deletion 
A) Autosomes 
B) Phenotype 
C) Incomplete dominance 
D) Duplication 
E) Heterozygous
F)Codominance
G)Linkage
H)Pedigree
I)Gene
J)Deletion

Question 9

If your parents are heterozygous for a gene,what is the chance that you will have at least one copy of it?

Accepted Answer

A) 0% 
B) 25% 
C) 50% 
D) 75% 
A) 0% 
B) 25% 
C) 50% 
D) 75%

Question 10

Paul was an orphan found wandering a city street when he was 2 years old.At age 52 he began to experience muscle spasms and was having difficulty walking.Which of the following genetic disorders is most probable?

Accepted Answer

A) PKU 
B) CF 
C) Huntington's Disease 
D) Marfan syndrome 
A) PKU 
B) CF 
C) Huntington's Disease 
D) Marfan syndrome

Question 11

Which genetic condition can be described as the inheritance of the heterozygous phenotype,which is expressed as an intermediate between the dominant and recessive alleles?

Accepted Answer

A) dominance 
B) codominance 
C) incomplete dominance 
D) epistasis 
A) dominance 
B) codominance 
C) incomplete dominance 
D) epistasis

Question 12

Carol has tested positive for phenylketonuria,or PKU,so let's help plan her diet when she gets to school.Which of the following things should she be most careful about?

Accepted Answer

A) beans 
B) tomatoes 
C) diet cola 
D) potatoes 
A) beans 
B) tomatoes 
C) diet cola 
D) potatoes

Question 13

Match each definition in the first column to the correct term in the second column.
-The cause of cri-du-chat syndrome.

Accepted Answer

A) Autosomes 
B) Phenotype 
C) Incomplete dominance 
D) Duplication 
E) Heterozygous
F)Codominance
G)Linkage
H)Pedigree
I)Gene
J)Deletion 
A) Autosomes 
B) Phenotype 
C) Incomplete dominance 
D) Duplication 
E) Heterozygous
F)Codominance
G)Linkage
H)Pedigree
I)Gene
J)Deletion

Question 14

Match each definition in the first column to the correct term in the second column.
-People with dark hair usually also inherit dark eyes.Why is this usually the case?

Accepted Answer

A) Autosomes 
B) Phenotype 
C) Incomplete dominance 
D) Duplication 
E) Heterozygous
F)Codominance
G)Linkage
H)Pedigree
I)Gene
J)Deletion 
A) Autosomes 
B) Phenotype 
C) Incomplete dominance 
D) Duplication 
E) Heterozygous
F)Codominance
G)Linkage
H)Pedigree
I)Gene
J)Deletion

Question 15

Thalassemia is a very serious disorder that affects hemoglobin.It is caused by an autosomal recessive gene.If both a woman and a man are carriers,then what is the chance that they will have a child with the disease?

Accepted Answer

A) 100% 
B) 75% 
C) 50% 
D) 25% 
A) 100% 
B) 75% 
C) 50% 
D) 25%

Question 16

A(n)________ directs the making of a protein.

Accepted Answer

The answer of A(n)________ directs the making of a protein....

Question 17

If two genes are on the same chromosomes and we look at a dihybrid cross between two heterozygous parents,will we see a pattern of 9:3:3:1? Why or why not?

Accepted Answer

No.Because the genes

Question 18

A(n)________ is someone who displays the dominant phenotype but who is heterozygous for a trait and can,therefore,pass the recessive allele to descendants.

Accepted Answer

The answer of A(n)________ is someone who displays the dominant...

Question 19

A genetic cross between two individuals who are heterozygous for two traits of interest is called a ________.

Accepted Answer

The answer of A genetic cross between two individuals who...

Question 20

If the two parents each are heterozygous for widow's peak and having freckles,what is the chance that any of their children will have the same phenotype?

Accepted Answer

A) 9/16 
B) 3/16 
C) 1/2 
D) 1/16 
A) 9/16 
B) 3/16 
C) 1/2 
D) 1/16

Exam 20: Genetics and Human Inheritance

Hakeem,given up for adoption as an infant,has red-green color blindness.Is this fact useful in helping him to track down his biological father? Explain.

If Hani has type A blood and his mother has type B blood,which of the following is the most likely genotype of Hani's father?

Why are pedigrees useful to track genetic disorders?

Adel has freckles,autosomal dominant,so please provide her genotype.

The gene for Tay-Sachs disease codes for a nonfunctional form of the enzyme hexosaminidase A (or Hex A). It has been found that a person with only one-third the maximum amount of Hex A can function absolutely normally. Please characterize the heredity of Tay-Sachs disease.

Babies were accidentally switched at the hospital! Mr.and Mrs.Fire both have type O blood.Which of the following four babies of the same age is most likely the Fire child?

What are the ethical and legal issues involved with gene testing?

Match each definition in the first column to the correct term in the second column. -This is what chromosomes other than X and Y are called.

If your parents are heterozygous for a gene,what is the chance that you will have at least one copy of it?

Paul was an orphan found wandering a city street when he was 2 years old.At age 52 he began to experience muscle spasms and was having difficulty walking.Which of the following genetic disorders is most probable?

Which genetic condition can be described as the inheritance of the heterozygous phenotype,which is expressed as an intermediate between the dominant and recessive alleles?

Carol has tested positive for phenylketonuria,or PKU,so let's help plan her diet when she gets to school.Which of the following things should she be most careful about?

Match each definition in the first column to the correct term in the second column. -The cause of cri-du-chat syndrome.

Match each definition in the first column to the correct term in the second column. -People with dark hair usually also inherit dark eyes.Why is this usually the case?

Thalassemia is a very serious disorder that affects hemoglobin.It is caused by an autosomal recessive gene.If both a woman and a man are carriers,then what is the chance that they will have a child with the disease?

A(n)________ directs the making of a protein.

If two genes are on the same chromosomes and we look at a dihybrid cross between two heterozygous parents,will we see a pattern of 9:3:3:1? Why or why not?

A(n)________ is someone who displays the dominant phenotype but who is heterozygous for a trait and can,therefore,pass the recessive allele to descendants.

A genetic cross between two individuals who are heterozygous for two traits of interest is called a ________.

If the two parents each are heterozygous for widow's peak and having freckles,what is the chance that any of their children will have the same phenotype?

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