Question 1

A male expresses

Accepted Answer

A)  only the dominant alleles on his X chromosome. 
B)  both the dominant and recessive alleles on his X chromosome. 
C)  only the homozygous recessive alleles on his X chromosome. 
D)  none of the alleles on his X chromosome. 
E)  only the homozygous dominant alleles on his X chromosome. 
A)  only the dominant alleles on his X chromosome. 
B)  both the dominant and recessive alleles on his X chromosome. 
C)  only the homozygous recessive alleles on his X chromosome. 
D)  none of the alleles on his X chromosome. 
E)  only the homozygous dominant alleles on his X chromosome. B

Question 2

The statement that segregation of alleles for a gene on one chromosome does not influence the segregation of alleles for a gene on another chromosome during gamete formation is Mendel's law of

Accepted Answer

A)  independent assortment. 
B)  random fertilization. 
C)  population dynamics. 
D)  crossing over. 
E)  segregation. 
A)  independent assortment. 
B)  random fertilization. 
C)  population dynamics. 
D)  crossing over. 
E)  segregation. A

Question 3

In pedigree charts,autosomal dominant disorders typically

Accepted Answer

A)  appear only in males. 
B)  appear only in females. 
C)  appear in every generation. 
D)  seem to disappear in one generation, only to reappear in the next generation. 
E)  occur every third generation. 
A)  appear only in males. 
B)  appear only in females. 
C)  appear in every generation. 
D)  seem to disappear in one generation, only to reappear in the next generation. 
E)  occur every third generation. C

Question 4

In these data, the parental generation characteristics (resistant or susceptible) are shown at the top.
  
-What did the researchers conclude from the data shown in the figure?

Accepted Answer

A)  Resistance to the Bt toxin is dominant. 
B)  The number of larvae is dependent on treatment with the Bt toxin. 
C)  Resistance to the Bt toxin is recessive. 
D)  The size of larvae is dependent on treatment with the Bt toxin. 
E)  Resistance to the Bt toxin is not genetic. 
A)  Resistance to the Bt toxin is dominant. 
B)  The number of larvae is dependent on treatment with the Bt toxin. 
C)  Resistance to the Bt toxin is recessive. 
D)  The size of larvae is dependent on treatment with the Bt toxin. 
E)  Resistance to the Bt toxin is not genetic.

Question 5

If you cross two pea plants,one with green peas and the other with yellow peas,and all of the offspring have yellow peas,you conclude

Accepted Answer

A)  green is dominant over yellow. 
B)  yellow and green are codominant. 
C)  yellow is incompletely dominant over green. 
D)  yellow is dominant over green. 
E)  color is random in pea plants. 
A)  green is dominant over yellow. 
B)  yellow and green are codominant. 
C)  yellow is incompletely dominant over green. 
D)  yellow is dominant over green. 
E)  color is random in pea plants.

Question 6

Hemophilia A is caused by

Accepted Answer

A)  an X-linked recessive disorder. 
B)  a Y-linked recessive disorder. 
C)  a defective neuron response. 
D)  an X-linked dominant disorder. 
E)  a Y-linked dominant disorder. 
A)  an X-linked recessive disorder. 
B)  a Y-linked recessive disorder. 
C)  a defective neuron response. 
D)  an X-linked dominant disorder. 
E)  a Y-linked dominant disorder.

Question 7

Mendel's law of segregation states that the two alleles of each gene are packaged into separate gametes.

Accepted Answer

A) True 
 B)False

Question 8

A test cross is a mating of an individual with an unknown genotype and an individual that

Accepted Answer

A)  is heterozygous. 
B)  is homozygous dominant. 
C)  is homozygous recessive. 
D)  has any known genotype. 
E)  is the wild type. 
A)  is heterozygous. 
B)  is homozygous dominant. 
C)  is homozygous recessive. 
D)  has any known genotype. 
E)  is the wild type.

Question 9

A portion of DNA that encodes a specific protein is a

Accepted Answer

A)  gene. 
B)  chromosome. 
C)  chromatid. 
D)  centromere. 
E)  kinetochore. 
A)  gene. 
B)  chromosome. 
C)  chromatid. 
D)  centromere. 
E)  kinetochore.

Question 10

If you cross RrYy and RRyy pea plants,what fraction of the offspring will have round peas? R=round,r=wrinkled,Y=yellow,y=green

Accepted Answer

A)  50% 
B)  75% 
C)  100% 
D)  25% 
E)  0% 
A)  50% 
B)  75% 
C)  100% 
D)  25% 
E)  0%

Question 11

If you cross RrYy and RRyy pea plants,what fraction of the offspring will have round yellow peas? R=round,r=wrinkled,Y=yellow,y=green

Accepted Answer

A)  100% 
B)  75% 
C)  25% 
D)  0% 
E)  50% 
A)  100% 
B)  75% 
C)  25% 
D)  0% 
E)  50%

Question 12

If the heterozygous phenotype is intermediate between that of the homozygotes,this is called

Accepted Answer

A)  codominance. 
B)  independent assortment. 
C)  linkage. 
D)  incomplete dominance. 
E)  polygenic. 
A)  codominance. 
B)  independent assortment. 
C)  linkage. 
D)  incomplete dominance. 
E)  polygenic.

Question 13

Diagrams depicting family relationships and phenotypes for a genetic disorder are

Accepted Answer

A)  linkage maps. 
B)  pedigree charts. 
C)  genotype maps. 
D)  Punnett squares. 
E)  bell-shaped curves. 
A)  linkage maps. 
B)  pedigree charts. 
C)  genotype maps. 
D)  Punnett squares. 
E)  bell-shaped curves.

Question 14

To inherit an autosomal dominant disorder a person could receive the allele leading to the disease from

Accepted Answer

A)  the father only, not the mother. 
B)  the mother only, not the father. 
C)  the mother or the father. 
D)  the parent who does not exhibit the disease. 
E)  All answers are correct. 
A)  the father only, not the mother. 
B)  the mother only, not the father. 
C)  the mother or the father. 
D)  the parent who does not exhibit the disease. 
E)  All answers are correct.

Question 15

Females who are "carriers" for hemophilia

Accepted Answer

A)  usually do not show symptoms of hemophilia but pass the allele for hemophilia to all of their offspring. 
B)  pass the allele for hemophilia to all of their sons. 
C)  usually show symptoms of hemophilia but do not pass the allele for hemophilia to their offspring. 
D)  usually show symptoms of hemophilia and pass the allele for hemophilia to all of their offspring. 
E)  usually do not show symptoms of hemophilia. 
A)  usually do not show symptoms of hemophilia but pass the allele for hemophilia to all of their offspring. 
B)  pass the allele for hemophilia to all of their sons. 
C)  usually show symptoms of hemophilia but do not pass the allele for hemophilia to their offspring. 
D)  usually show symptoms of hemophilia and pass the allele for hemophilia to all of their offspring. 
E)  usually do not show symptoms of hemophilia.

Question 16

In pedigree charts,autosomal recessive disorders typically

Accepted Answer

A)  appear in every generation. 
B)  appear only in males. 
C)  appear only in females. 
D)  may disappear in one generation and reappear in the next generation. 
E)  occur every third generation. 
A)  appear in every generation. 
B)  appear only in males. 
C)  appear only in females. 
D)  may disappear in one generation and reappear in the next generation. 
E)  occur every third generation.

Question 17

To inherit an autosomal recessive disorder requires that the person receive the allele leading to the disease from

Accepted Answer

A)  the father only. 
B)  the mother only. 
C)  only the parent having the disease. 
D)  only one parent who is homozygous recessive for the disease. 
E)  both parents. 
A)  the father only. 
B)  the mother only. 
C)  only the parent having the disease. 
D)  only one parent who is homozygous recessive for the disease. 
E)  both parents.

Question 18

In the ABO blood type system,there are six possible genotypes,but only two possible phenotypes.

Accepted Answer

A) True 
 B)False

Question 19

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

Accepted Answer

A)  dominant. 
B)  recessive. 
C)  pleiotropic. 
D)  codominant. 
E)  incomplete dominant. 
A)  dominant. 
B)  recessive. 
C)  pleiotropic. 
D)  codominant. 
E)  incomplete dominant.

Question 20

Recombinant chromosomes have a mix of paternal and maternal alleles due to

Accepted Answer

A)  random fertilization. 
B)  linkage. 
C)  independent assortment. 
D)  crossing over. 
E)  mutation. 
A)  random fertilization. 
B)  linkage. 
C)  independent assortment. 
D)  crossing over. 
E)  mutation.

Exam 10: Patterns of Inheritance

A male expresses

The statement that segregation of alleles for a gene on one chromosome does not influence the segregation of alleles for a gene on another chromosome during gamete formation is Mendel's law of

In pedigree charts,autosomal dominant disorders typically

In these data, the parental generation characteristics (resistant or susceptible) are shown at the top. -What did the researchers conclude from the data shown in the figure?

If you cross two pea plants,one with green peas and the other with yellow peas,and all of the offspring have yellow peas,you conclude

Hemophilia A is caused by

Mendel's law of segregation states that the two alleles of each gene are packaged into separate gametes.

A test cross is a mating of an individual with an unknown genotype and an individual that

A portion of DNA that encodes a specific protein is a

If you cross RrYy and RRyy pea plants,what fraction of the offspring will have round peas? R=round,r=wrinkled,Y=yellow,y=green

If you cross RrYy and RRyy pea plants,what fraction of the offspring will have round yellow peas? R=round,r=wrinkled,Y=yellow,y=green

If the heterozygous phenotype is intermediate between that of the homozygotes,this is called

Diagrams depicting family relationships and phenotypes for a genetic disorder are

To inherit an autosomal dominant disorder a person could receive the allele leading to the disease from

Females who are "carriers" for hemophilia

In pedigree charts,autosomal recessive disorders typically

To inherit an autosomal recessive disorder requires that the person receive the allele leading to the disease from

In the ABO blood type system,there are six possible genotypes,but only two possible phenotypes.

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

Recombinant chromosomes have a mix of paternal and maternal alleles due to

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