Bio 111 exam 2 UPDATED ACTUAL Questions and
CORRECT Answers
(For questions 1, 2 and 3) The Drosophila C. they are linked and are 10 cM apart
mutant vestigial has a mutant allele (vg) that
causes reduced wing size, while another
gene, black body, has a mutant allele (b)
that causes a uniform black body instead of
the normal stripes. True-breeding vestigial
flies are crossed to true breeding black
body flies. The progeny are all wild type.
When an F1 was test crossed to vestigial
black body flies the following phenotypic
data were obtained:
b vg+ 90
b+ vg+ 490
b+ vg 10
b vg 410
Given these data, what can you conclude
about the relative location of these two
loci?
A. they are unlinked.
B. they are linked and 42 cM apart.
C. they are linked and 10 cM apart.
D. Both A and B are correct.
E. Both A and C are correct.
Based on the above information, what is C. it has wild type wings and a black body
the phenotype of a fly that is heterozygous
at the vg locus and has two b alleles?
A. It is wildtype.
B. It has vestigial wings and wild type body.
C. It has wild type wings and a black body.
D. It has vestigial wings and a black body.
,Which of the following best represents the A. b+ vg+ / b vg x b vg / b vg
cross that produced the above data?
A. b+ vg+ / b vg x b vg / b vg
B. b+ vg+ / b vg x b+ vg+/ b+ vg+
C. b+ vg / b vg+ x b vg/ b vg
D. b+ vg / b vg+ x b+ vg+ / b+ vg+
E. b+ vg+ / b vg x b+ vg+ / b vg
If two genetic loci are known to assort D. All of the above are correct
independently,
A. they are not linked.
B. they may be located on separate
chromosomes or on the same
chromosome.
C. crossing over may occur between the
two loci.
D. All of the above are correct.
E. Only A and B are correct.
Approximately what percentage of the E. 2%
human genome is made up of protein
coding genes?
A. 90%
B. 28%
C. 25%
D. 19%
E. 2%
Single nucleotide polymorphisms E. Only B and C are correct
A. are the non-random associations
between the genotype at one locus and
the genotype at another.
B. may be found in your genome.
C. may be found in coding or noncoding
regions of DNA.
D. All of the above are correct.
E. Only B and C are correct
MSSNG is a data base, produced as part of E. Only A and B have been determined
the Autism Speaks Genome Project, which
provides researchers with genomic
sequence data of families affected by
autism. Which of the following are true
about individuals on the autism spectrum,
or about MSSNG data?
A. The majority of their DNA changes occur
in non-protein coding regions.
B. Over 100 genes have been identified that
are linked to Autism Spectrum Disorder
(ASD)
C. Mutations associate with ASD are always
inherited from a parent.
D. All of the above have been determined.
E. Only A and B have been determined.
, The following summarizes steps in the D. Deficient in the enzyme necessary to convert arginosuccinate to arginine
arginine biosynthetic pathway:
Glutamate ⇒ ornithine ⇒ citrulline ⇒
arginosuccinate ⇒ arginine.
A Neurospora mutant could not grow on
minimal media, or minimal media
supplemented with ornithine alone,
citrulline alone, or arginosuccinate alone,
but could grow if only arginine was added
to the media. Based on this information
alone you could conclude that this mutant
was:
A. deficient in enzymes necessary to
convert ornithine to citrulline.
B. deficient in enzymes necessary to
convert glutamate to ornithine.
C. deficient in enzymes necessary to
convert citrulline to arginosuccinate.
D. deficient in the enzyme necessary to
convert arginosuccinate to arginine.
E. More than one of the above is correct.
Genes in Neurospora: D. Both A and B are correct
A. may be alternatively spliced.
B. are translated in the cytoplasm.
C. are part of an operon.
D. Both A and B are correct.
E. Both B and C are correct.
The genetic code is redundant. This means D. some anticodons are complementary to more than one codon
that
A. every codon codes for more than one
amino acid.
B. some codons code for more than one
amino acid.
C. some codons are complementary to
more than one anticodon.
D. some anticodons are complementary to
more than one codon.
E. every anticodon is complementary to
more than one codon.
The RNA core polymerase A. is found in prokaryotes and is not capable of accurate initiation
A. is found in prokaryotes and is not
capable of accurate initiation.
B. has a sigma factor that recognizes a
promoter.
C. associates with transcription factors.
D. Both A and B only.
E. Both B and C only.
CORRECT Answers
(For questions 1, 2 and 3) The Drosophila C. they are linked and are 10 cM apart
mutant vestigial has a mutant allele (vg) that
causes reduced wing size, while another
gene, black body, has a mutant allele (b)
that causes a uniform black body instead of
the normal stripes. True-breeding vestigial
flies are crossed to true breeding black
body flies. The progeny are all wild type.
When an F1 was test crossed to vestigial
black body flies the following phenotypic
data were obtained:
b vg+ 90
b+ vg+ 490
b+ vg 10
b vg 410
Given these data, what can you conclude
about the relative location of these two
loci?
A. they are unlinked.
B. they are linked and 42 cM apart.
C. they are linked and 10 cM apart.
D. Both A and B are correct.
E. Both A and C are correct.
Based on the above information, what is C. it has wild type wings and a black body
the phenotype of a fly that is heterozygous
at the vg locus and has two b alleles?
A. It is wildtype.
B. It has vestigial wings and wild type body.
C. It has wild type wings and a black body.
D. It has vestigial wings and a black body.
,Which of the following best represents the A. b+ vg+ / b vg x b vg / b vg
cross that produced the above data?
A. b+ vg+ / b vg x b vg / b vg
B. b+ vg+ / b vg x b+ vg+/ b+ vg+
C. b+ vg / b vg+ x b vg/ b vg
D. b+ vg / b vg+ x b+ vg+ / b+ vg+
E. b+ vg+ / b vg x b+ vg+ / b vg
If two genetic loci are known to assort D. All of the above are correct
independently,
A. they are not linked.
B. they may be located on separate
chromosomes or on the same
chromosome.
C. crossing over may occur between the
two loci.
D. All of the above are correct.
E. Only A and B are correct.
Approximately what percentage of the E. 2%
human genome is made up of protein
coding genes?
A. 90%
B. 28%
C. 25%
D. 19%
E. 2%
Single nucleotide polymorphisms E. Only B and C are correct
A. are the non-random associations
between the genotype at one locus and
the genotype at another.
B. may be found in your genome.
C. may be found in coding or noncoding
regions of DNA.
D. All of the above are correct.
E. Only B and C are correct
MSSNG is a data base, produced as part of E. Only A and B have been determined
the Autism Speaks Genome Project, which
provides researchers with genomic
sequence data of families affected by
autism. Which of the following are true
about individuals on the autism spectrum,
or about MSSNG data?
A. The majority of their DNA changes occur
in non-protein coding regions.
B. Over 100 genes have been identified that
are linked to Autism Spectrum Disorder
(ASD)
C. Mutations associate with ASD are always
inherited from a parent.
D. All of the above have been determined.
E. Only A and B have been determined.
, The following summarizes steps in the D. Deficient in the enzyme necessary to convert arginosuccinate to arginine
arginine biosynthetic pathway:
Glutamate ⇒ ornithine ⇒ citrulline ⇒
arginosuccinate ⇒ arginine.
A Neurospora mutant could not grow on
minimal media, or minimal media
supplemented with ornithine alone,
citrulline alone, or arginosuccinate alone,
but could grow if only arginine was added
to the media. Based on this information
alone you could conclude that this mutant
was:
A. deficient in enzymes necessary to
convert ornithine to citrulline.
B. deficient in enzymes necessary to
convert glutamate to ornithine.
C. deficient in enzymes necessary to
convert citrulline to arginosuccinate.
D. deficient in the enzyme necessary to
convert arginosuccinate to arginine.
E. More than one of the above is correct.
Genes in Neurospora: D. Both A and B are correct
A. may be alternatively spliced.
B. are translated in the cytoplasm.
C. are part of an operon.
D. Both A and B are correct.
E. Both B and C are correct.
The genetic code is redundant. This means D. some anticodons are complementary to more than one codon
that
A. every codon codes for more than one
amino acid.
B. some codons code for more than one
amino acid.
C. some codons are complementary to
more than one anticodon.
D. some anticodons are complementary to
more than one codon.
E. every anticodon is complementary to
more than one codon.
The RNA core polymerase A. is found in prokaryotes and is not capable of accurate initiation
A. is found in prokaryotes and is not
capable of accurate initiation.
B. has a sigma factor that recognizes a
promoter.
C. associates with transcription factors.
D. Both A and B only.
E. Both B and C only.
