Genetics and Genomics Final Exam
Study Guide Questions with Verified
Answers
20,000 - ANSWERSThe best estimate for the number of human genes is
The HFE gene alleles are located on the "short arms" of chromosome number 6 -
ANSWERSWhat is the correct interpretation of the statement "the HFE gene locus is
6p21?"
d) specifies 25 amino acids - ANSWERSWhich of the following is not correct regarding
the genetic code?
a) is a triplet code
b) consists of 64 codons
c) has three stop codons
d) specifies 25 amino acids
alternative forms of a gene - ANSWERSAlleles are
20% - ANSWERSWhat percentage of bases in a stretch of double-stranded DNA that
contains 30% guanine (G) bases would be adenine (A)?
CCAGTTAGGAATC - ANSWERSWhat would be the sequence of DNA that is
complementary to a DNA section with the base sequence of GGTCAATCCTTAG?
cytosine and guanine - ANSWERSWhich of the complementary base pairs form the
strongest or "tightest" association?
all DNA replicated - ANSWERSWhich activity occurs during S phase of the cell cycle?
homozygosity of alleles - ANSWERSUnder what normal condition are genotype and
phenotype always the same?
A = 25%
B = 50%
O = 0%
AB = 25% - ANSWERSWhat are the expected expressed blood types of children born
to a mother who is B/O for blood type and a father who is A/B for blood type?
nonsense mutation - ANSWERSA point mutation that changes a codon specifying an
amino acid into a stop codon is called a
, CAU, GUA - ANSWERSThe triplet code of CAT in DNA is represented as ______ in
mRNA and ______ in tRNA, respectively
A gene is a section of DNA that provides the directions for synthesizing a specific
protein - ANSWERSWhat is the relationship among genes, DNA, and proteins?
Replacing an amino acid codon with a "stop" codon, resulting in a truncated protein
product - ANSWERSWhat is the expected result of a "nonsense" point mutation?
There is no risk of passing on a cancer predisposition to one's children from a somatic
cell mutation. - ANSWERSHow does an acquired mutation in a somatic cell gene
leading to cancer development affect a person's ability to pass on a predisposition for
that cancer type to his or her children?
Serves as the coordinator mechanism to allow proper reading of the mRNA and
placement of the correct amino acid in the sequence by the tRNA - ANSWERSWhat is
the function of ribosomes (also known as ribosomal RNA) in protein synthesis?
ribosomes - ANSWERSWhich of the following is not needed for DNA transcription?
-can occur when one or more nucleotides are inserted into DNA sequence
-result in a completely new codon sequence that results in the production of non-
functional proteins
-applies to the reading frame being changed
-can occur when one of more nucleotides is deleted from a DNA sequence -
ANSWERSFrameshift mutations
UAA - ANSWERSWhich of the following is a stop codon?
DNA --> transcription --> RNA --> translation --> protein - ANSWERSThe "Central
Dogma" of protein synthesis can be summed up as follows:
to ensure cell division occurs only when it is needed - ANSWERSWhat is the function of
a suppressor gene product?
opposing tumor suppressor gene products and promoting cell division - ANSWERSHow
do cyclins influence the process of cell division?
one - ANSWERSHow many mature ovum result from the complete oogenesis of one
oogonium?
a single round of DNA synthesis followed by two separate rounds of meiotic cell division
- ANSWERSWhich cell division process sequences are normal for meiosis for
gametogenesis?
Study Guide Questions with Verified
Answers
20,000 - ANSWERSThe best estimate for the number of human genes is
The HFE gene alleles are located on the "short arms" of chromosome number 6 -
ANSWERSWhat is the correct interpretation of the statement "the HFE gene locus is
6p21?"
d) specifies 25 amino acids - ANSWERSWhich of the following is not correct regarding
the genetic code?
a) is a triplet code
b) consists of 64 codons
c) has three stop codons
d) specifies 25 amino acids
alternative forms of a gene - ANSWERSAlleles are
20% - ANSWERSWhat percentage of bases in a stretch of double-stranded DNA that
contains 30% guanine (G) bases would be adenine (A)?
CCAGTTAGGAATC - ANSWERSWhat would be the sequence of DNA that is
complementary to a DNA section with the base sequence of GGTCAATCCTTAG?
cytosine and guanine - ANSWERSWhich of the complementary base pairs form the
strongest or "tightest" association?
all DNA replicated - ANSWERSWhich activity occurs during S phase of the cell cycle?
homozygosity of alleles - ANSWERSUnder what normal condition are genotype and
phenotype always the same?
A = 25%
B = 50%
O = 0%
AB = 25% - ANSWERSWhat are the expected expressed blood types of children born
to a mother who is B/O for blood type and a father who is A/B for blood type?
nonsense mutation - ANSWERSA point mutation that changes a codon specifying an
amino acid into a stop codon is called a
, CAU, GUA - ANSWERSThe triplet code of CAT in DNA is represented as ______ in
mRNA and ______ in tRNA, respectively
A gene is a section of DNA that provides the directions for synthesizing a specific
protein - ANSWERSWhat is the relationship among genes, DNA, and proteins?
Replacing an amino acid codon with a "stop" codon, resulting in a truncated protein
product - ANSWERSWhat is the expected result of a "nonsense" point mutation?
There is no risk of passing on a cancer predisposition to one's children from a somatic
cell mutation. - ANSWERSHow does an acquired mutation in a somatic cell gene
leading to cancer development affect a person's ability to pass on a predisposition for
that cancer type to his or her children?
Serves as the coordinator mechanism to allow proper reading of the mRNA and
placement of the correct amino acid in the sequence by the tRNA - ANSWERSWhat is
the function of ribosomes (also known as ribosomal RNA) in protein synthesis?
ribosomes - ANSWERSWhich of the following is not needed for DNA transcription?
-can occur when one or more nucleotides are inserted into DNA sequence
-result in a completely new codon sequence that results in the production of non-
functional proteins
-applies to the reading frame being changed
-can occur when one of more nucleotides is deleted from a DNA sequence -
ANSWERSFrameshift mutations
UAA - ANSWERSWhich of the following is a stop codon?
DNA --> transcription --> RNA --> translation --> protein - ANSWERSThe "Central
Dogma" of protein synthesis can be summed up as follows:
to ensure cell division occurs only when it is needed - ANSWERSWhat is the function of
a suppressor gene product?
opposing tumor suppressor gene products and promoting cell division - ANSWERSHow
do cyclins influence the process of cell division?
one - ANSWERSHow many mature ovum result from the complete oogenesis of one
oogonium?
a single round of DNA synthesis followed by two separate rounds of meiotic cell division
- ANSWERSWhich cell division process sequences are normal for meiosis for
gametogenesis?
