Genetics Final Exam: Comprehensive Solutions
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Translocations can help:
A) determine linkage groups.
B) aid in the diagnosis and treatment of certain cancers.
C) map important genes.
D) all of the above - CORRECT ANSWER- -D) all of the above
Down Syndrome can result from:
A) three copies of chromosome 21.
B) a translocation of a part of chromosome 21.
C) a reciprocal translocation between any two autosomes.
D) a and b
E) a, b, and c - CORRECT ANSWER- -D) a and b
Which of the following do translocations and inversions not have in common?
A) don't alter the amount of DNA in the genome
B) ability to alter gene function
C) use of inversion loops during crossing over
D) catalysts of speciation - CORRECT ANSWER- -C) use of inversion loops during crossing
over
A transposition is considered a cytologically invisible sequence rearrangement. With which
of the following does it share this property?
A) small deletion
,B) large duplication
C) inversion
D) translocation - CORRECT ANSWER- -A) small deletion
Barbara McClintock is most closely associated with which of the following?
A) The initial discovery of genetic transposition.
B) The discovery of transposable elements in corn.
C) The mutation rate in translocation heterozygotes.
D) The demonstration of the presence of transposable elements in polytene chromosomes
- CORRECT ANSWER- -B) The discovery of transposable elements in corn
Which of the following does not usually show a problem during meiosis?
A) translocation heterozygotes
B) translocation homozygotes
C) paracentric inversion
D) pericentric inversion - CORRECT ANSWER- -B) translocation homozygotes
Of the following segregation patterns, which one is most likely to result in a normalzygote?
A) alternate
B) adjacent-1
C) adjacent-2
D) nondisjunction - CORRECT ANSWER- -A) alternate
The condition of semisterility is most closely associated with:
A) chromosomal duplications.
B) pericentric inversions.
C) translocation heterozygotes.
, D) translocation homozygotes - CORRECT ANSWER- -C) translocation heterozygotes
Transposable elements have many things in common. Which of the following is not ausual
characteristic of them?
A) Typically smaller than 50 bp.
B) May be present in a genome from one to thousands of times.
C) Are found only in a select group of organisms.
D) Need not be sequences that do something for the organism - CORRECT ANSWER- -A)
Typically smaller than 50bp
Retroposons and retro-viruses have structural parallels. Which of the following alsoshares
structural parallels with them?
A) tRNA
B) DS-DNA
C) rRNA
D) mRNA - CORRECT ANSWER- -D) mRNA
Which of the following is a possible effect that a transposable element may have on agene?
A) Shift the reading frame.
B) Diminish the efficiency of splicing.
C) Provide a transcription stop signal.
D) all of the above - CORRECT ANSWER- -D) all of the above
Which of the following is not an aneuploidy?
A) monosomy
B) tetraploid
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Academic Excellence to Boost Your Grades
Translocations can help:
A) determine linkage groups.
B) aid in the diagnosis and treatment of certain cancers.
C) map important genes.
D) all of the above - CORRECT ANSWER- -D) all of the above
Down Syndrome can result from:
A) three copies of chromosome 21.
B) a translocation of a part of chromosome 21.
C) a reciprocal translocation between any two autosomes.
D) a and b
E) a, b, and c - CORRECT ANSWER- -D) a and b
Which of the following do translocations and inversions not have in common?
A) don't alter the amount of DNA in the genome
B) ability to alter gene function
C) use of inversion loops during crossing over
D) catalysts of speciation - CORRECT ANSWER- -C) use of inversion loops during crossing
over
A transposition is considered a cytologically invisible sequence rearrangement. With which
of the following does it share this property?
A) small deletion
,B) large duplication
C) inversion
D) translocation - CORRECT ANSWER- -A) small deletion
Barbara McClintock is most closely associated with which of the following?
A) The initial discovery of genetic transposition.
B) The discovery of transposable elements in corn.
C) The mutation rate in translocation heterozygotes.
D) The demonstration of the presence of transposable elements in polytene chromosomes
- CORRECT ANSWER- -B) The discovery of transposable elements in corn
Which of the following does not usually show a problem during meiosis?
A) translocation heterozygotes
B) translocation homozygotes
C) paracentric inversion
D) pericentric inversion - CORRECT ANSWER- -B) translocation homozygotes
Of the following segregation patterns, which one is most likely to result in a normalzygote?
A) alternate
B) adjacent-1
C) adjacent-2
D) nondisjunction - CORRECT ANSWER- -A) alternate
The condition of semisterility is most closely associated with:
A) chromosomal duplications.
B) pericentric inversions.
C) translocation heterozygotes.
, D) translocation homozygotes - CORRECT ANSWER- -C) translocation heterozygotes
Transposable elements have many things in common. Which of the following is not ausual
characteristic of them?
A) Typically smaller than 50 bp.
B) May be present in a genome from one to thousands of times.
C) Are found only in a select group of organisms.
D) Need not be sequences that do something for the organism - CORRECT ANSWER- -A)
Typically smaller than 50bp
Retroposons and retro-viruses have structural parallels. Which of the following alsoshares
structural parallels with them?
A) tRNA
B) DS-DNA
C) rRNA
D) mRNA - CORRECT ANSWER- -D) mRNA
Which of the following is a possible effect that a transposable element may have on agene?
A) Shift the reading frame.
B) Diminish the efficiency of splicing.
C) Provide a transcription stop signal.
D) all of the above - CORRECT ANSWER- -D) all of the above
Which of the following is not an aneuploidy?
A) monosomy
B) tetraploid
