Question 1

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)  the yellow parent was homozygous for the recessive allele.
B)  the yellow parent was homozygous for the dominant gene.
C)  the yellow parent was homozygous for the dominant allele.
D)  the yellow parent was homozygous for the recessive gene.
E)  the yellow parent was heterozygous.F) A) and D)
G) B) and C)

Question 2

Of all the people who have studied inheritance,the person who made the most lasting impression on the science of genetics is

Accepted Answer

A)  Charles Darwin.
B)  Robert Hooke.
C)  King George III.
D)  Frederick Griffith.
E)  Gregor Mendel.F) B) and D)
G) A) and E)

Question 3

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

Accepted Answer

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

Question 4

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

Accepted Answer

A) True 
 B)False

Question 5

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.F) A) and C)
G) A) and B)

Question 6

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)  1:1:1:1.F) C) and D)
G) A) and D)

Question 7

If a pea plant is homozygous for yellow seeds (YY) ,which gametes will it produce?

Accepted Answer

A)  Y only
B)  Y or y
C)  y only
D)  Yy
E)  YYyyF) None of the above
G) C) and D)

Question 8

If you cross two heterozygous Yy pea plants,what proportion of the offspring will be the dominant color yellow?

Accepted Answer

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

Question 9

Females who are "carriers" for hemophilia

Accepted Answer

A)  theoretically pass the allele for hemophilia to half of their offspring.
B)  theoretically pass the allele for hemophilia to half of their daughters who become at least "carriers" for this disorder.
C)  All answers are correct.
D)  theoretically pass the allele for hemophilia to half of their sons who become hemophiliacs.
E)  usually do not show any symptoms of hemophilia.F) C) and D)
G) A) and E)

Question 10

When Mendel crossed tall (Tt) plants with tall (Tt) plants the offspring

Accepted Answer

A)  did not grow and reproduce.
B)  were always short.
C)  were always tall.
D)  were always medium height.
E)  were mostly tall individuals and a few short individuals.F) B) and E)
G) B) and C)

Question 11

The genotypes shown in the figure are for an X-linked recessive trait.

Accepted Answer

A) True 
 B)False

Question 12

Yellow peas are an example of

Accepted Answer

A)  a phenotype.
B)  a genotype.
C)  an allele.
D)  a gene.
E)  a loci.F) A) and B)
G) A) and D)

Question 13

A man with type A blood and a woman with type B blood have a child with type O blood.What are the genotypes of the man and woman?

Accepted Answer

A)  IA i,and IB i
B)  both are i i
C)  IA IA,and IB IB
D)  IA i,and i i
E)  i i,and IB iF) B) and E)
G) A) and E)

Question 14

Place the following terms in order from smallest to largest: cell,chromosome,DNA nucleotides,and gene.

Accepted Answer

A)  DNA nucleotides,gene,chromosome,cell
B)  gene,chromosome,DNA nucleotides,cell
C)  DNA nucleotides,chromosome,gene,cell
D)  DNA nucleotides,chromosome,cell,gene
E)  gene,DNA nucleotides,chromosome,cellF) A) and D)
G) B) and E)

Question 15

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.F) B) and C)
G) A) and D)

Question 16

All gametes contain

Accepted Answer

A)  two identical sets of chromosomes.
B)  two different sets of chromosomes.
C)  one set of chromosomes.
D)  one chromosome.
E)  two chromosomes.F) A) and E)
G) B) and C)

Question 17

A recessive allele is one whose effect is masked if a dominant allele is also present.

Accepted Answer

A) True 
 B)False

Question 18

Linked genes,by definition,are genes that

Accepted Answer

A)  are found on the same chromosome.
B)  have no alleles.
C)  are found in the same species.
D)  have more alleles than usual.
E)  are alleles that are found in different daughter cells.F) B) and C)
G) A) and B)

Question 19

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 answers are correct.F) A) and B)
G) B) and E)

Question 20

Mendel called a trait that is masked

Accepted Answer

A)  homozygous.
B)  heterozygous.
C)  dominant.
D)  recessive.
E)  None of the answers are correct.F) B) and E)
G) A) and E)

Exam 10: Patterns of Inheritance

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

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Autosomes

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

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Yellow peas are an example of

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Linked genes,by definition,are genes that

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

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Of all the people who have studied inheritance,the person who made the most lasting impression on the science of genetics is

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Females who are "carriers" for hemophilia

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Place the following terms in order from smallest to largest: cell,chromosome,DNA nucleotides,and gene.

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If you cross two heterozygous Yy pea plants,what proportion of the offspring will be the dominant color yellow?

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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

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

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All gametes contain

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Mendel called a trait that is masked

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

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The genotypes shown in the figure are for an X-linked recessive trait.

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When Mendel crossed tall (Tt) plants with tall (Tt) plants the offspring

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A recessive allele is one whose effect is masked if a dominant allele is also present.

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A man with type A blood and a woman with type B blood have a child with type O blood.What are the genotypes of the man and woman?

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If a pea plant is homozygous for yellow seeds (YY) ,which gametes will it produce?

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