Question 1

If two alleles influencing the expressed phenotype for a trait are equally expressed, this is an example of

Accepted Answer

A)  polymorphism. 
B)  codominance. 
C)  pleiotropy. 
D)  Mendelian inheritance. 
A)  polymorphism. 
B)  codominance. 
C)  pleiotropy. 
D)  Mendelian inheritance. B

Question 2

Somatic cells include all of the following EXCEPT

Accepted Answer

A)  lung cells. 
B)  gametes. 
C)  skin cells. 
D)  neurons. 
A)  lung cells. 
B)  gametes. 
C)  skin cells. 
D)  neurons. B

Question 3

A small molecule known as a methyl group can attach to DNA.Which of the following statements about this event is true?

Accepted Answer

A)  This is the event that initiates DNA transcription. 
B)  This is the event that stops DNA translation. 
C)  This event, called methylation, usually stops or represses the expression of a gene. 
D)  This event, called linkage, was discovered by Mendel but was not completely understood until decades later. 
A)  This is the event that initiates DNA transcription. 
B)  This is the event that stops DNA translation. 
C)  This event, called methylation, usually stops or represses the expression of a gene. 
D)  This event, called linkage, was discovered by Mendel but was not completely understood until decades later. C

Question 4

Transfer RNA

Accepted Answer

A)  seeks complementary triplet strands of mRNA codons. 
B)  contains a random sequence of codons. 
C)  breaks amino acids apart from their polypeptide chains. 
D)  facilitates the movement of DNA between cells. 
A)  seeks complementary triplet strands of mRNA codons. 
B)  contains a random sequence of codons. 
C)  breaks amino acids apart from their polypeptide chains. 
D)  facilitates the movement of DNA between cells.

Question 5

Somatic cells are characterized by all of the following EXCEPT

Accepted Answer

A)  each includes a nucleus at some stage of its development. 
B)  they are used in multiple tissues throughout the body. 
C)  each contains half a copy of an organism's DNA. 
D)  each contains a complete copy of all of an organism's DNA. 
A)  each includes a nucleus at some stage of its development. 
B)  they are used in multiple tissues throughout the body. 
C)  each contains half a copy of an organism's DNA. 
D)  each contains a complete copy of all of an organism's DNA.

Question 6

Which of the following statements is an accurate comparison of eukaryotic and prokaryotic cells?

Accepted Answer

A)  Prokaryotic cells include the gametes and various single-celled organisms, while eukaryotic cells may occur as single-celled or multicelled organisms. 
B)  Eukaryotic cells include gametes, have cell membranes and a nucleus, and may occur as single-celled or multicelled organisms. 
C)  Prokaryotic cells make up single-celled organisms, while eukaryotic cells make up multicelled organisms. 
D)  The earliest eukaryotic cells appeared about 3.5 billion years ago, while the earliest prokaryotic cells appeared about 1.2 billion years ago. 
A)  Prokaryotic cells include the gametes and various single-celled organisms, while eukaryotic cells may occur as single-celled or multicelled organisms. 
B)  Eukaryotic cells include gametes, have cell membranes and a nucleus, and may occur as single-celled or multicelled organisms. 
C)  Prokaryotic cells make up single-celled organisms, while eukaryotic cells make up multicelled organisms. 
D)  The earliest eukaryotic cells appeared about 3.5 billion years ago, while the earliest prokaryotic cells appeared about 1.2 billion years ago.

Question 7

Haplotypes are

Accepted Answer

A)  not likely to recombine during crossovers. 
B)  likely to recombine during crossovers. 
C)  genes that code for similar things. 
D)  genetic material that come from one parent only. 
A)  not likely to recombine during crossovers. 
B)  likely to recombine during crossovers. 
C)  genes that code for similar things. 
D)  genetic material that come from one parent only.

Question 8

________ DNA is heteroplasmic, meaning it can differ among different parts of a person's body.

Accepted Answer

A)  Nuclear 
B)  All 
C)  Ribosomal 
D)  Mitochondrial 
A)  Nuclear 
B)  All 
C)  Ribosomal 
D)  Mitochondrial

Question 9

DNA

Accepted Answer

A)  is single stranded. 
B)  contains six different nucleotide bases. 
C)  directs cellular function. 
D)  contains the base uracil. 
A)  is single stranded. 
B)  contains six different nucleotide bases. 
C)  directs cellular function. 
D)  contains the base uracil.

Question 10

RNA differs from DNA in that it uses

Accepted Answer

A)  uracil instead of adenine. 
B)  uracil instead of guanine. 
C)  guanine instead of uracil. 
D)  uracil instead of thymine. 
A)  uracil instead of adenine. 
B)  uracil instead of guanine. 
C)  guanine instead of uracil. 
D)  uracil instead of thymine.

Question 11

Individuals whose blood type is A and who carry both dominant and recessive genes at this locus have a genotype of

Accepted Answer

A)  AA. 
B)  AO. 
C)  AB. 
D)  OO. 
A)  AA. 
B)  AO. 
C)  AB. 
D)  OO.

Question 12

Down syndrome can occur

Accepted Answer

A)  as a result of translocation during mitosis. 
B)  because of nondisjunction, which yields an extra chromosome. 
C)  most frequently in the offspring of women under the age of 40. 
D)  most frequently in the offspring of men under the age of 40. 
A)  as a result of translocation during mitosis. 
B)  because of nondisjunction, which yields an extra chromosome. 
C)  most frequently in the offspring of women under the age of 40. 
D)  most frequently in the offspring of men under the age of 40.

Question 13

What is the evolutionary significance of meiosis?

Accepted Answer

Adaptation by natural selection depends

Question 14

DNA replication produces

Accepted Answer

A)  four identical daughter cells. 
B)  two identical copies of itself. 
C)  two single strands of DNA. 
D)  four single strands of DNA. 
A)  four identical daughter cells. 
B)  two identical copies of itself. 
C)  two single strands of DNA. 
D)  four single strands of DNA.

Question 15

In his experiments with garden peas, Mendel found that one physical unit is inherited from the father and one from the mother.This provided evidence for

Accepted Answer

A)  Mendel's law of independent assortment. 
B)  Thomas Hunt Morgan's ideas of mutation. 
C)  Mendel's law of segregation. 
D)  Mendel's concept of nondisjunction. 
A)  Mendel's law of independent assortment. 
B)  Thomas Hunt Morgan's ideas of mutation. 
C)  Mendel's law of segregation. 
D)  Mendel's concept of nondisjunction.

Question 16

DNA is important for protein synthesis because it

Accepted Answer

A)  is the biological code for the production of hormones and enzymes. 
B)  serves as a template to which amino acids are attached in protein production. 
C)  provides the code to produce proteins. 
D)  transfers information from RNA to proteins. 
A)  is the biological code for the production of hormones and enzymes. 
B)  serves as a template to which amino acids are attached in protein production. 
C)  provides the code to produce proteins. 
D)  transfers information from RNA to proteins.

Question 17

Define polygenic and pleiotropic traits and explain their significance for researchers' efforts to link human genotypes to phenotypes.

Accepted Answer

The relationship between most genes and

Question 18

Describe the steps involved in protein synthesis.

Accepted Answer

DNA serves as a template for protein syn

Question 19

Meiosis results in the production of

Accepted Answer

A)  two gametes. 
B)  four gametes. 
C)  a single gamete. 
D)  two identical somatic cells. 
A)  two gametes. 
B)  four gametes. 
C)  a single gamete. 
D)  two identical somatic cells.

Question 20

Proteins consist of

Accepted Answer

A)  genes. 
B)  RNA plus mRNA. 
C)  chains of DNA nucleotides. 
D)  chains of amino acids. 
A)  genes. 
B)  RNA plus mRNA. 
C)  chains of DNA nucleotides. 
D)  chains of amino acids.

If two alleles influencing the expressed phenotype for a trait are equally expressed, this is an example of

Somatic cells include all of the following EXCEPT

A small molecule known as a methyl group can attach to DNA.Which of the following statements about this event is true?

Transfer RNA

Somatic cells are characterized by all of the following EXCEPT

Which of the following statements is an accurate comparison of eukaryotic and prokaryotic cells?

Haplotypes are

________ DNA is heteroplasmic, meaning it can differ among different parts of a person's body.

DNA

RNA differs from DNA in that it uses

Individuals whose blood type is A and who carry both dominant and recessive genes at this locus have a genotype of

Down syndrome can occur

What is the evolutionary significance of meiosis?

DNA replication produces

In his experiments with garden peas, Mendel found that one physical unit is inherited from the father and one from the mother.This provided evidence for

DNA is important for protein synthesis because it

Define polygenic and pleiotropic traits and explain their significance for researchers' efforts to link human genotypes to phenotypes.

Describe the steps involved in protein synthesis.

Meiosis results in the production of

Proteins consist of

What Is Biological Anthropology

Evolution: Constructing a Fundamental Scientific Theory

Genes and Their Evolution: Population Genetics

Biology in the Present: Living People

Biology in the Present: the Other Living Primates

Primate Sociality, Social Behavior, and Culture

Fossils and Their Place in Time and Nature

Primate Origins and Evolution: the First 50 Million Years

Early Hominin Origins and Evolution: The Roots of Humanity

The Origins and Evolution of Early Homo

The Origins, Evolution, and Dispersal of Modern People

The Past 10,000 Years: Agriculture, Population, Biology

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Exam 3: Genetics: Reproducing Life and Producing Variation

If two alleles influencing the expressed phenotype for a trait are equally expressed, this is an example of

Somatic cells include all of the following EXCEPT

A small molecule known as a methyl group can attach to DNA.Which of the following statements about this event is true?

Transfer RNA

Somatic cells are characterized by all of the following EXCEPT

Which of the following statements is an accurate comparison of eukaryotic and prokaryotic cells?

Haplotypes are

________ DNA is heteroplasmic, meaning it can differ among different parts of a person's body.

DNA

RNA differs from DNA in that it uses

Individuals whose blood type is A and who carry both dominant and recessive genes at this locus have a genotype of

Down syndrome can occur

What is the evolutionary significance of meiosis?

DNA replication produces

In his experiments with garden peas, Mendel found that one physical unit is inherited from the father and one from the mother.This provided evidence for

DNA is important for protein synthesis because it

Define polygenic and pleiotropic traits and explain their significance for researchers' efforts to link human genotypes to phenotypes.

Describe the steps involved in protein synthesis.

Meiosis results in the production of

Proteins consist of

What Is Biological Anthropology

Evolution: Constructing a Fundamental Scientific Theory

Genes and Their Evolution: Population Genetics

Biology in the Present: Living People

Biology in the Present: the Other Living Primates

Primate Sociality, Social Behavior, and Culture

Fossils and Their Place in Time and Nature

Primate Origins and Evolution: the First 50 Million Years

Early Hominin Origins and Evolution: The Roots of Humanity

The Origins and Evolution of Early Homo

The Origins, Evolution, and Dispersal of Modern People

The Past 10,000 Years: Agriculture, Population, Biology

Filters