Question 1

For the traits Mendel studied in pea plants,each trait,or phenotype,is expressed in only the dominant or recessive form,depending on the genotype.

Accepted Answer

A) True 
 B)False  True

Question 2

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

Accepted Answer

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

Question 3

Bollworms raised for decades in a lab without exposure to Bt were ___ while those fed Bt were ___

Accepted Answer

A)  RR; Rr. 
B)  RR; rr. 
C)  Rr; RR. 
D)  Rr; rr. 
E)  rr; RR. 
A)  RR; Rr. 
B)  RR; rr. 
C)  Rr; RR. 
D)  Rr; rr. 
E)  rr; RR. B

Question 4

A single chromosome has

Accepted Answer

A)  a single gene with multiple alleles. 
B)  a single gene with a single allele. 
C)  multiple genes, each with multiple alleles. 
D)  multiple genes, each with a single allele. 
A)  a single gene with multiple alleles. 
B)  a single gene with a single allele. 
C)  multiple genes, each with multiple alleles. 
D)  multiple genes, each with a single allele.

Question 5

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 IA, and IB IB 
B)  IA i , and IB i 
C)  i i, and IB i 
D)  IA i, and i i 
E)  Both are i i 
A)  IA IA, and IB IB 
B)  IA i , and IB i 
C)  i i, and IB i 
D)  IA i, and i i 
E)  Both are i i

Question 6

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

Accepted Answer

A)  independent assortment. 
B)  crossing over having happened between the linked genes. 
C)  persistent linkage of genes on the chromatid. 
D)  random fertilization of the gametes. 
E)  point mutations and gene aberrations from replication. 
A)  independent assortment. 
B)  crossing over having happened between the linked genes. 
C)  persistent linkage of genes on the chromatid. 
D)  random fertilization of the gametes. 
E)  point mutations and gene aberrations from replication.

Question 7

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

Accepted Answer

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

Question 8

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

Accepted Answer

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

Question 9

In humans,alleles for each gene are inherited from

Accepted Answer

A)  males only (dads). 
B)  females only (moms). 
C)  None of the answer choices are correct. 
D)  males and females (one allele from each parent). 
E)  males and females (two alleles from each parent). 
A)  males only (dads). 
B)  females only (moms). 
C)  None of the answer choices are correct. 
D)  males and females (one allele from each parent). 
E)  males and females (two alleles from each parent).

Question 10

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

Accepted Answer

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

Question 11

Hemophilia A is an X-linked recessive disorder.If a normal man marries a woman who is a carrier,what fraction of their daughters will have hemophilia?

Accepted Answer

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

Question 12

Mendel kept detailed records of the genetic traits of parent plants and their offspring plants.Among observations,he found that some traits would be expressed,whenever one particular allele was present,and called this allele

Accepted Answer

A)  homologous. 
B)  heterozygous. 
C)  homozygous. 
D)  dominant. 
E)  recessive. 
A)  homologous. 
B)  heterozygous. 
C)  homozygous. 
D)  dominant. 
E)  recessive.

Question 13

Mendel observed that some genetic traits seemed to mask others in the pea plants,and used the term ___ to describe these traits.

Accepted Answer

A)  homozygous 
B)  heterozygous 
C)  recessive 
D)  dominant 
E)  homologous 
A)  homozygous 
B)  heterozygous 
C)  recessive 
D)  dominant 
E)  homologous

Question 14

Your biology instructor has assigned you a lab exercise to test a hypothesis regarding the inheritance of stem length in pea plants.If your assignment is specifically to conduct a monohybrid cross for stem length from available genotypes growing in the lab,which of the following crosses should be performed?

Accepted Answer

A)  Tt with tt 
B)  Tt with tt. 
C)  Tt with TT 
D)  Tt with Tt 
E)  TT with TT. 
A)  Tt with tt 
B)  Tt with tt. 
C)  Tt with TT 
D)  Tt with Tt 
E)  TT with TT.

Question 15

In the ABO blood type system the alleles IA,IB,and i produce

Accepted Answer

A)  two phenotypes. 
B)  one phenotype. 
C)  four phenotypes. 
D)  type A and type B blood types only. 
E)  three phenotypes. 
A)  two phenotypes. 
B)  one phenotype. 
C)  four phenotypes. 
D)  type A and type B blood types only. 
E)  three phenotypes.

Question 16

Linked genes,by definition,are genes that

Accepted Answer

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

Question 17

If you conduct a monohybrid cross of two heterozygous Yy pea plants,what percentage of the offspring will be heterozygous?

Accepted Answer

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

Question 18

This figure shows one reason among others why pea plants (Pisum sativum)are a good species for genetics studies.In reference to information given in the text,pea plants are good for genetics studies because

Accepted Answer

A)  they have many distinctly identifiable forms of genetic traits. 
B)  growth of pea plants is simple and easy. 
C)  All of the answer choices are correct. 
D)  they can be self-fertilized for true-breeding genetic traits. 
E)  they produce large numbers of offspring (the peas). 
A)  they have many distinctly identifiable forms of genetic traits. 
B)  growth of pea plants is simple and easy. 
C)  All of the answer choices are correct. 
D)  they can be self-fertilized for true-breeding genetic traits. 
E)  they produce large numbers of offspring (the peas).

Question 19

Linkage maps are diagrams of nitrogen base sequences on DNA.

Accepted Answer

A) True 
 B)False

Question 20

In humans,the condition of male pattern baldness is an example of a(n)

Accepted Answer

A)  genotype. 
B)  phenotype. 
C)  allele. 
D)  locus. 
E)  gene. 
A)  genotype. 
B)  phenotype. 
C)  allele. 
D)  locus. 
E)  gene.

Exam 10: Patterns of Inheritance

For the traits Mendel studied in pea plants,each trait,or phenotype,is expressed in only the dominant or recessive form,depending on the genotype.

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

Bollworms raised for decades in a lab without exposure to Bt were ___ while those fed Bt were ___

A single chromosome has

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?

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

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

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

In humans,alleles for each gene are inherited from

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

Hemophilia A is an X-linked recessive disorder.If a normal man marries a woman who is a carrier,what fraction of their daughters will have hemophilia?

Mendel kept detailed records of the genetic traits of parent plants and their offspring plants.Among observations,he found that some traits would be expressed,whenever one particular allele was present,and called this allele

Mendel observed that some genetic traits seemed to mask others in the pea plants,and used the term ___ to describe these traits.

In the ABO blood type system the alleles IA,IB,and i produce

Linked genes,by definition,are genes that

If you conduct a monohybrid cross of two heterozygous Yy pea plants,what percentage of the offspring will be heterozygous?

This figure shows one reason among others why pea plants (Pisum sativum)are a good species for genetics studies.In reference to information given in the text,pea plants are good for genetics studies because

Linkage maps are diagrams of nitrogen base sequences on DNA.

In humans,the condition of male pattern baldness is an example of a(n)

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Bollworms raised for decades in a lab without exposure to Bt were _ while those fed Bt were _

In the ABO blood type system the alleles I^A,I^B,and i produce