Question 1

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.E) All of the above
F) None of the above

Question 2

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.E) A) and B)
F) All of the above

Question 3

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

Accepted Answer

A)   Nuclear
B)   All
C)   Ribosomal
D)   MitochondrialE) A) and B)
F) A) and C)

Question 4

What is the evolutionary significance of meiosis?

Accepted Answer

Adaptation by natural selection depends ...

Question 5

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.E) A) and B)
F) A) and C)

Question 6

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.E) None of the above
F) All of the above

Question 7

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.E) A) and C)
F) All of the above

Question 8

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.E) None of the above
F) A) and B)

Question 9

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.E) A) and B)
F) B) and C) B

Question 10

Somatic cells include all of the following EXCEPT

Accepted Answer

A)   lung cells.
B)   gametes.
C)   skin cells.
D)   neurons.E) All of the above
F) A) and D) B

Question 11

DNA

Accepted Answer

A)   is single stranded.
B)   contains six different nucleotide bases.
C)   directs cellular function.
D)   contains the base uracil.E) A) and C)
F) All of the above

Question 12

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.E) All of the above
F) B) and C)

Question 13

Meiosis results in the production of

Accepted Answer

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

Question 14

Proteins consist of

Accepted Answer

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

Question 15

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.E) B) and C)
F) B) and D)

Question 16

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.E) A) and B)
F) All of the above C

Question 17

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.E) All of the above
F) A) and B)

Question 18

Describe the steps involved in protein synthesis.

Accepted Answer

DNA serves as a template for protein syn...

Question 19

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.E) All of the above
F) C) and D)

Question 20

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 ...

Exam 3: Genetics: Reproducing Life and Producing Variation

DNA is important for protein synthesis because it

Correct AnswerverifiedShow Answer

Down syndrome can occur

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

Correct AnswerverifiedShow Answer

What is the evolutionary significance of meiosis?

Correct AnswerverifiedAdaptation by natural selection depends ...View AnswerShow Answer

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

Correct AnswerverifiedShow Answer

Transfer RNA

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

RNA differs from DNA in that it uses

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedB

Somatic cells include all of the following EXCEPT

Correct AnswerverifiedB

DNA

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DNA replication produces

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Meiosis results in the production of

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Proteins consist of

Correct AnswerverifiedShow Answer

Haplotypes are

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

Correct AnswerverifiedC

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

Correct AnswerverifiedShow Answer

Describe the steps involved in protein synthesis.

Correct AnswerverifiedDNA serves as a template for protein syn...View AnswerShow Answer

Somatic cells are characterized by all of the following EXCEPT

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedThe relationship between most genes and ...View AnswerShow Answer

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Adaptation by natural selection depends ...
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B

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B

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C

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DNA serves as a template for protein syn...
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The relationship between most genes and ...
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