Question 1

A male expresses an X-linked recessive disorder only if he inherits these alleles from both parents.

Accepted Answer

A) True 
 B)False

Question 2

Phenotype means:

Accepted Answer

A)  The number of gametes in an individual
B)  The number of chromosomes in an individual
C)  The combination of alleles in an individual
D)  The genes an individual has
E)  The observable expression of the genes in an individualF) A) and B)
G) A) and E)

Question 3

What did the researchers conclude from figure 10.28?

Accepted Answer

A)  That resistance to Bt toxin is dominant
B)  That the number of larvae is dependent on treatment with Bt toxin
C)  That resistance to Bt toxin is recessive
D)  That the size of larvae is dependent on treatment with Bt toxin
E)  That resistance to Bt toxin is not geneticF) B) and C)
G) A) and E)

Question 4

Having the alleles Tt is:

Accepted Answer

A)  A phenotype
B)  Linkage
C)  A genotype
D)  A gene
E)  A lociF) A) and B)
G) B) and D)

Question 5

X-linked recessive disorders affect more females than males.

Accepted Answer

A) True 
 B)False

Question 6

Organisms other than humans have mechanisms other than the X and Y chromosomes for determining sex of an individual.

Accepted Answer

A) True 
 B)False

Question 7

If while examining a human karyotype,it is observed that there are 22 paired chromosomes and two chromosomes that are not the same size,this would most likely be due to:

Accepted Answer

A)  The karyotype belonging to a female
B)  Nondisjunction
C)  The karyotype belonging to a male or nondisjunction
D)  The karyotype belonging to a male
E)  The karyotype belonging to a female or nondisjunctionF) A) and D)
G) A) and B)

Question 8

In a karyotype,the major characteristics that uniquely identify each chromosome are:

Accepted Answer

A)  Sequence of nitrogen bases, types of proteins, and banding pattern
B)  Types of proteins, number of telomeres, and size
C)  Size, number of telomeres, and banding pattern
D)  Centromere position, banding pattern, and size
E)  Position in the nucleus, types of proteins, and sizeF) A) and B)
G) B) and C)

Question 9

Genotypes are the outward expression of an allele combination.

Accepted Answer

A) True 
 B)False

Question 10

In humans,alleles are inherited from:

Accepted Answer

A)  Females only (moms) 
B)  Males only (dads) 
C)  Males and females (one allele from each parent) 
D)  Males and females (two alleles from each parent) 
E)  None are correctF) B) and E)
G) A) and C)

Question 11

When scientists inserted the Bt toxin gene into plant cells they created a _____.

Accepted Answer

A)  New species
B)  Clone
C)  Stem cell
D)  Transgenic plant
E)  MonohybridF) C) and E)
G) All of the above

Question 12

A gene that produces a protein that is important in more than one biochemical pathway is a ___ gene.

Accepted Answer

A)  Dominant
B)  Recessive
C)  Pleiotropic
D)  Codominant
E)  Incomplete dominantF) C) and E)
G) All of the above

Question 13

In an inherited form of high cholesterol,rr individuals have a blood cholesterol level greater than 500mg/dL,Rr individuals are near 300mg/dL,while normal (RR) cholesterol levels should be less than 200mg/dL.The R allele is ___ to the r allele.

Accepted Answer

A)  Codominant
B)  Dominant
C)  Recessive
D)  Homozygous
E)  Incompletely dominantF) B) and D)
G) A) and C)

Question 14

The movement of DNA from one chromosome to a nonhomologous chromosome that will be passed onto future generations:

Accepted Answer

A)  Is nondisjunction during meiosis
B)  Is translocation during meiosis
C)  Is translocation during mitosis
D)  Is nondisjunction during mitosisE) B) and D)
F) B) and C)

Question 15

A dihybrid cross of linked genes theoretically gives a phenotypic ratio of:

Accepted Answer

A)  9:3:3:1
B)  2:1
C)  3:1
D)  1:1
E)  1:1:1:1F) C) and E)
G) B) and D)

Question 16

Autosomes:

Accepted Answer

A)  Are chromosomes that are the same for both sexes
B)  Include the Y chromosome in humans
C)  Include the X chromosome in humans
D)  Are the sex chromosomes
E)  All are correctF) A) and B)
G) A) and C)

Question 17

If you cross two pea plants,one with green peas and the other with yellow peas.All of the offspring have yellow peas.The yellow and green parental plants:

Accepted Answer

A)  Both have the same alleles for pea color
B)  Both have the same gene for pea color
C)  Have different genes for pea color
D)  Have different loci for pea color
E)  Have different numbers of chromosomesF) B) and D)
G) All of the above

Question 18

If a person has a recessive allele for a disease and that allele is masked by a normal dominant allele,this person:

Accepted Answer

A)  Homozygous for the disease
B)  Cannot produce gametes
C)  Is termed a "carrier"
D)  Is termed a linkage group
E)  Has the disease but cannot pass this disease to their offspringF) A) and E)
G) B) and D)

Question 19

If a pea plant is heterozygous for yellow seeds (Yy) ,which gametes could it produce?

Accepted Answer

A)  Y
B)  Y or y
C)  y
D)  Yy
E)  YYyyF) D) and E)
G) B) and E)

Question 20

If the two alleles for a particular gene are identical the gene pair is:

Accepted Answer

A)  Homozygous
B)  Homologous
C)  Heterozygous
D)  Dominant
E)  RecessiveF) D) and E)
G) All of the above

Exam 10: Patterns of Inheritance

Organisms other than humans have mechanisms other than the X and Y chromosomes for determining sex of an individual.

Correct AnswerverifiedShow Answer

X-linked recessive disorders affect more females than males.

Correct AnswerverifiedShow Answer

If while examining a human karyotype,it is observed that there are 22 paired chromosomes and two chromosomes that are not the same size,this would most likely be due to:

Correct AnswerverifiedShow Answer

Phenotype means:

Correct AnswerverifiedShow Answer

Autosomes:

Correct AnswerverifiedShow Answer

In an inherited form of high cholesterol,rr individuals have a blood cholesterol level greater than 500mg/dL,Rr individuals are near 300mg/dL,while normal (RR) cholesterol levels should be less than 200mg/dL.The R allele is ___ to the r allele.

Correct AnswerverifiedShow Answer

If a person has a recessive allele for a disease and that allele is masked by a normal dominant allele,this person:

Correct AnswerverifiedShow Answer

In humans,alleles are inherited from:

Correct AnswerverifiedShow Answer

In a karyotype,the major characteristics that uniquely identify each chromosome are:

Correct AnswerverifiedShow Answer

Genotypes are the outward expression of an allele combination.

Correct AnswerverifiedShow Answer

A gene that produces a protein that is important in more than one biochemical pathway is a ___ gene.

Correct AnswerverifiedShow Answer

What did the researchers conclude from figure 10.28?

Correct AnswerverifiedShow Answer

When scientists inserted the Bt toxin gene into plant cells they created a _____.

Correct AnswerverifiedShow Answer

If the two alleles for a particular gene are identical the gene pair is:

Correct AnswerverifiedShow Answer

If you cross two pea plants,one with green peas and the other with yellow peas.All of the offspring have yellow peas.The yellow and green parental plants:

Correct AnswerverifiedShow Answer

A male expresses an X-linked recessive disorder only if he inherits these alleles from both parents.

Correct AnswerverifiedShow Answer

If a pea plant is heterozygous for yellow seeds (Yy) ,which gametes could it produce?

Correct AnswerverifiedShow Answer

The movement of DNA from one chromosome to a nonhomologous chromosome that will be passed onto future generations:

Correct AnswerverifiedShow Answer

Having the alleles Tt is:

Correct AnswerverifiedShow Answer

A dihybrid cross of linked genes theoretically gives a phenotypic ratio of:

Correct AnswerverifiedShow Answer

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