FULL TEST BANK: HUMAN
GENETICS BY RICKI LEWIS, 13TH
EDITION (CHAPTER. 1-23) WITH
QUESTIONS AND VERIFIED
ANSWERS [ALREADY GRADED A+]
1) Genetics is the study of
A) inherited traits.
B) how organisms reproduce.
C) how life originated.
D) how the environment causes disease.
Answer: A) inherited traits.
2) In which choice are the entries listed from smallest to largest?
A) DNA building block - gene - chromosome - genome
B) DNA building block - RNA building block - protein
C) Gene - cell - DNA - genome
D) Chromosome - genome - cell - DNA building block
Answer: A) DNA building block - gene - chromosome - genome.
3) The complete genetic material of an organism is its
A) genome.
B) chromosome.
C) phenotype.
D) genotype.
Answer: A) genome.
4) The number of sets of our genome in most of our cells is __________.
A) 1
B) 2
C) 3
D) 4
Answer: B) 2.
5) An estimated __________ DNA base pairs comprise the human genome.
A) 32,000
B) 320,000
,C) 3.2 million
D) 3.2 billion
Answer: D) 3.2 billion.
6) The field of __________ addresses concerns arising from the use of new genetic
technologies, including tests, treatments, privacy, and discrimination.
A) metaethics
B) bioethics
C) biotechnology
D) genetics
Answer: B) bioethics.
7) Variants of a gene are called
A) genotypes.
B) phenotypes.
C) alleles.
D) single nucleotide polymorphisms.
Answer: C) alleles.
8) Humans have __________ pairs of chromosomes.
A) 23
B) 38
C) 46
D) 32
Answer: A) 23.
9) A change in a gene's DNA sequence is a
A) genotype.
B) nucleotide.
C) mutation.
D) genome.
Answer: C) mutation.
10) In general, RNA molecules
A) comprise the chromosomes.
B) serve as messengers to allow the information in DNA to be used to construct
proteins.
C) entwine with DNA molecules to encode proteins.
D) form double helices that encode DNA sequences.
Answer: B) serve as messengers to allow the information in DNA to be used to
construct proteins.
11) A genotype refers to
A) the alleles present in an individual.
B) expression patterns of certain genes.
,C) the environmental components of a trait.
D) the number of chromosomes that a person has.
Answer: A) the alleles present in an individual.
12) A chart that displays paired chromosomes in order of size is a
A) phenotype.
B) genotype.
C) karyotype.
D) genome.
Answer: C) karyotype.
13) A human cell has
A) 22 pairs of sex chromosomes and one pair of autosomes.
B) 22 pairs of autosomes and one pair of sex chromosomes.
C) 23 pairs of autosomes.
D) 23 pairs of autosomes and a pair of Y chromosomes.
Answer: B) 22 pairs of autosomes and one pair of sex chromosomes.
14) The Y chromosome
A) forms the somatic cells.
B) is a sex chromosome.
C) contains discontinuous DNA sequence.
D) is present in all humans.
Answer: B) is a sex chromosome.
15) Polydactyly is considered a Mendelian trait because
A) it is caused by linked genes.
B) it is caused by a single gene.
C) it is caused due to environmental factors.
D) it affects the stem cells.
Answer: B) it is caused by a single gene.
16) Which of the following traits is considered Mendelian?
A) A trait which is caused by linked genes
B) A trait which is caused by a single gene
C) A trait which is caused by environmental factors
D) A trait which is multifactorial
Answer: B) A trait which is caused by a single gene.
17) One way to study the human genome is to
A) determine the twisting patterns of the two sides of the double helix.
B) determine the sequence of sugars and phosphates.
C) determine the DNA sequence.
D) conduct a phenotype-wide association study.
Answer: C) determine the DNA sequence.
, 18) During transcription, the sequence of one strand of a DNA molecule is
copied into a related molecule, known as a
A) gene.
B) messenger RNA.
C) protein.
D) chromosome.
Answer: B) messenger RNA.
19) A human body has about __________ cells.
A) 3.2 billion
B) 20,600
C) 30 trillion
D) 10 to 100 million
Answer: C) 30 trillion.
20) Cells differentiate by
A) expressing different subsets of genes.
B) expressing the entire genome, then silencing some genes.
C) activating all of the DNA that encodes protein.
D) becoming stem cells.
Answer: A) expressing different subsets of genes.
21) The difference between phenotype and genotype is that
A) phenotype refers to the genetic instructions and genotype to their expression.
B) genotype refers to the genetic instructions and phenotype to their expression.
C) the phenotype is RNA and the genotype is DNA.
D) the phenotype is DNA and the genotype is RNA.
Answer: B) genotype refers to the genetic instructions and phenotype to their
expression.
22) Shawn's mother and Heather's mother are sisters. Shawn and Heather have
__________ of their genes in common.
A) 1/2
B) 1/4
C) 1/8
D) 1/16
Answer: C) 1/8.
23) A gene pool consists of all the alleles in a(n)
A) population.
B) individual.
C) family.
D) neighborhood.
Answer: A) population.
GENETICS BY RICKI LEWIS, 13TH
EDITION (CHAPTER. 1-23) WITH
QUESTIONS AND VERIFIED
ANSWERS [ALREADY GRADED A+]
1) Genetics is the study of
A) inherited traits.
B) how organisms reproduce.
C) how life originated.
D) how the environment causes disease.
Answer: A) inherited traits.
2) In which choice are the entries listed from smallest to largest?
A) DNA building block - gene - chromosome - genome
B) DNA building block - RNA building block - protein
C) Gene - cell - DNA - genome
D) Chromosome - genome - cell - DNA building block
Answer: A) DNA building block - gene - chromosome - genome.
3) The complete genetic material of an organism is its
A) genome.
B) chromosome.
C) phenotype.
D) genotype.
Answer: A) genome.
4) The number of sets of our genome in most of our cells is __________.
A) 1
B) 2
C) 3
D) 4
Answer: B) 2.
5) An estimated __________ DNA base pairs comprise the human genome.
A) 32,000
B) 320,000
,C) 3.2 million
D) 3.2 billion
Answer: D) 3.2 billion.
6) The field of __________ addresses concerns arising from the use of new genetic
technologies, including tests, treatments, privacy, and discrimination.
A) metaethics
B) bioethics
C) biotechnology
D) genetics
Answer: B) bioethics.
7) Variants of a gene are called
A) genotypes.
B) phenotypes.
C) alleles.
D) single nucleotide polymorphisms.
Answer: C) alleles.
8) Humans have __________ pairs of chromosomes.
A) 23
B) 38
C) 46
D) 32
Answer: A) 23.
9) A change in a gene's DNA sequence is a
A) genotype.
B) nucleotide.
C) mutation.
D) genome.
Answer: C) mutation.
10) In general, RNA molecules
A) comprise the chromosomes.
B) serve as messengers to allow the information in DNA to be used to construct
proteins.
C) entwine with DNA molecules to encode proteins.
D) form double helices that encode DNA sequences.
Answer: B) serve as messengers to allow the information in DNA to be used to
construct proteins.
11) A genotype refers to
A) the alleles present in an individual.
B) expression patterns of certain genes.
,C) the environmental components of a trait.
D) the number of chromosomes that a person has.
Answer: A) the alleles present in an individual.
12) A chart that displays paired chromosomes in order of size is a
A) phenotype.
B) genotype.
C) karyotype.
D) genome.
Answer: C) karyotype.
13) A human cell has
A) 22 pairs of sex chromosomes and one pair of autosomes.
B) 22 pairs of autosomes and one pair of sex chromosomes.
C) 23 pairs of autosomes.
D) 23 pairs of autosomes and a pair of Y chromosomes.
Answer: B) 22 pairs of autosomes and one pair of sex chromosomes.
14) The Y chromosome
A) forms the somatic cells.
B) is a sex chromosome.
C) contains discontinuous DNA sequence.
D) is present in all humans.
Answer: B) is a sex chromosome.
15) Polydactyly is considered a Mendelian trait because
A) it is caused by linked genes.
B) it is caused by a single gene.
C) it is caused due to environmental factors.
D) it affects the stem cells.
Answer: B) it is caused by a single gene.
16) Which of the following traits is considered Mendelian?
A) A trait which is caused by linked genes
B) A trait which is caused by a single gene
C) A trait which is caused by environmental factors
D) A trait which is multifactorial
Answer: B) A trait which is caused by a single gene.
17) One way to study the human genome is to
A) determine the twisting patterns of the two sides of the double helix.
B) determine the sequence of sugars and phosphates.
C) determine the DNA sequence.
D) conduct a phenotype-wide association study.
Answer: C) determine the DNA sequence.
, 18) During transcription, the sequence of one strand of a DNA molecule is
copied into a related molecule, known as a
A) gene.
B) messenger RNA.
C) protein.
D) chromosome.
Answer: B) messenger RNA.
19) A human body has about __________ cells.
A) 3.2 billion
B) 20,600
C) 30 trillion
D) 10 to 100 million
Answer: C) 30 trillion.
20) Cells differentiate by
A) expressing different subsets of genes.
B) expressing the entire genome, then silencing some genes.
C) activating all of the DNA that encodes protein.
D) becoming stem cells.
Answer: A) expressing different subsets of genes.
21) The difference between phenotype and genotype is that
A) phenotype refers to the genetic instructions and genotype to their expression.
B) genotype refers to the genetic instructions and phenotype to their expression.
C) the phenotype is RNA and the genotype is DNA.
D) the phenotype is DNA and the genotype is RNA.
Answer: B) genotype refers to the genetic instructions and phenotype to their
expression.
22) Shawn's mother and Heather's mother are sisters. Shawn and Heather have
__________ of their genes in common.
A) 1/2
B) 1/4
C) 1/8
D) 1/16
Answer: C) 1/8.
23) A gene pool consists of all the alleles in a(n)
A) population.
B) individual.
C) family.
D) neighborhood.
Answer: A) population.
