BSC 108 Exam 3 Questions and Answers
| Detailed Review with Correct Solutions
| Grade A+
A. male...the sperm can fertilize either a female egg or a male egg.
B. female...only the female has two functional sex chromosomes.
C. female...only the female provides cytoplasm to the zygote.
D. male...the male can contribute either an X or a Y chromosome. -✓✓D
Which of the following is not one of the four components of Mendel's hypothesis of
inheritance?
A. There are alternative versions of genes, the units that determine heritable traits.
B. For each inherited character, an organism inherits 2 alleles; one from each parent.
C. If the 2 alleles of an inherited pair differ, then the one that determines the
appearance is called dominant and the other has no noticeable effect on appearance is
called recessive.
D. A sperm or egg carries only 1 allele for each inherited character because the 2
membranes of an allele pair segregate during gamete production.
E. Inherited pairs of genes are found in each of the parental crosses. -✓✓E
How do new viruses arise?
A. Mutation of existing viruses
B. Not taking all your antibiotics
C. Spread to new host species
D. All of the above are correct
E. Only A and C are correct -✓✓E
In DNA, the nucleotides are on the outside of the double helix.
A. True
B. False -✓✓B
DNA technology has revolutionized forensic science. Several unsolved cases have
been solved with this type of evidence, and some convicted persons have been
exonerated with DNA evidence. What is the type of technology shown in the image?
A. Centrifugation
B. DNA splicing
C. Gel Electrophoresis
D. Polymerase Chain Reaction -✓✓C
What technique can be used to investigate murders, determine paternity or maternity,
and study relationships with ancient DNA?
A. Human Genome Project
B. Genetic Testing
, C. DNA profiling
D. GMO -✓✓C
Although all of the cells in your body contain a complete set of DNA, different types of
cells arise because ___________.
A. different genes are switched on and off in each type of cell
B. they contain different chromosomes
C. they contain different genes
D. None of the above -✓✓A
HIV requires an enzyme called ___________ to convert its RNA genome to a DNA
version.
A. DNA polymerase
B. reverse transcriptase
C. RNA polymerase -✓✓B
Which of the following is not true:
A. The flow of genetic information in a cell is RNA to DNA to Protein.
B. A mutation is any change in the nucleotide sequence of DNA.
C. Mutations may result from errors in DNA replication.
D. Mutations may result from physical or chemical agents called mutagens. -✓✓A
Which of the following choices best defines "recombinant DNA technology"?
A. an independent assortment of alternate alleles
B. combining genes from different species
C. cloning genes from homologous pairs of chromosomes
D. manipulated crossing over
E. combining alternate alleles on the same chromosome.` -✓✓B
Color-blindness is an example of ___________.
A. a Ribonucleic Acid
B. an X-linked gene
C. a codominant allele
D. a disease that only affects human males -✓✓B
___________ is defined as an organism's expressed physical traits.
A. Genotype
B. Phenotype
C. Heritable trait
D. None of the above -✓✓B
Different forms of the same gene are referred to as ___________.
A. Homozygous
B. Heterozygous
C. Alleles
| Detailed Review with Correct Solutions
| Grade A+
A. male...the sperm can fertilize either a female egg or a male egg.
B. female...only the female has two functional sex chromosomes.
C. female...only the female provides cytoplasm to the zygote.
D. male...the male can contribute either an X or a Y chromosome. -✓✓D
Which of the following is not one of the four components of Mendel's hypothesis of
inheritance?
A. There are alternative versions of genes, the units that determine heritable traits.
B. For each inherited character, an organism inherits 2 alleles; one from each parent.
C. If the 2 alleles of an inherited pair differ, then the one that determines the
appearance is called dominant and the other has no noticeable effect on appearance is
called recessive.
D. A sperm or egg carries only 1 allele for each inherited character because the 2
membranes of an allele pair segregate during gamete production.
E. Inherited pairs of genes are found in each of the parental crosses. -✓✓E
How do new viruses arise?
A. Mutation of existing viruses
B. Not taking all your antibiotics
C. Spread to new host species
D. All of the above are correct
E. Only A and C are correct -✓✓E
In DNA, the nucleotides are on the outside of the double helix.
A. True
B. False -✓✓B
DNA technology has revolutionized forensic science. Several unsolved cases have
been solved with this type of evidence, and some convicted persons have been
exonerated with DNA evidence. What is the type of technology shown in the image?
A. Centrifugation
B. DNA splicing
C. Gel Electrophoresis
D. Polymerase Chain Reaction -✓✓C
What technique can be used to investigate murders, determine paternity or maternity,
and study relationships with ancient DNA?
A. Human Genome Project
B. Genetic Testing
, C. DNA profiling
D. GMO -✓✓C
Although all of the cells in your body contain a complete set of DNA, different types of
cells arise because ___________.
A. different genes are switched on and off in each type of cell
B. they contain different chromosomes
C. they contain different genes
D. None of the above -✓✓A
HIV requires an enzyme called ___________ to convert its RNA genome to a DNA
version.
A. DNA polymerase
B. reverse transcriptase
C. RNA polymerase -✓✓B
Which of the following is not true:
A. The flow of genetic information in a cell is RNA to DNA to Protein.
B. A mutation is any change in the nucleotide sequence of DNA.
C. Mutations may result from errors in DNA replication.
D. Mutations may result from physical or chemical agents called mutagens. -✓✓A
Which of the following choices best defines "recombinant DNA technology"?
A. an independent assortment of alternate alleles
B. combining genes from different species
C. cloning genes from homologous pairs of chromosomes
D. manipulated crossing over
E. combining alternate alleles on the same chromosome.` -✓✓B
Color-blindness is an example of ___________.
A. a Ribonucleic Acid
B. an X-linked gene
C. a codominant allele
D. a disease that only affects human males -✓✓B
___________ is defined as an organism's expressed physical traits.
A. Genotype
B. Phenotype
C. Heritable trait
D. None of the above -✓✓B
Different forms of the same gene are referred to as ___________.
A. Homozygous
B. Heterozygous
C. Alleles
