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

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) YYyy 
A) Y only 
B) Y or y 
C) y only 
D) Yy 
E) YYyy

Question 3

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. 
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.

Question 4

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. 
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.

Question 5

Mendel called a trait that is masked

Accepted Answer

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

Question 6

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 7

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 i 
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 i

Question 8

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 9

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. 
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.

Question 10

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

Question 11

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

Question 12

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

Question 13

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. 
A) 9:3:3:1. 
B) 2:1. 
C) 3:1. 
D) 1:1. 
E) 1:1:1:1.

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,cell 
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,cell

Question 15

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

Question 16

Yellow peas are an example of

Accepted Answer

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

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

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. 
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.

Question 19

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. 
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.

Question 20

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

Accepted Answer

A) True 
 B)False

Exam 10: Patterns of Inheritance

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

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

Autosomes

Linked genes,by definition,are genes that

Mendel called a trait that is masked

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

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?

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

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

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

All gametes contain

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

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

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

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

Yellow peas are an example of

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

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

Females who are "carriers" for hemophilia

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

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