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UNIT VII: Genetics
- Online Test
UNIT VII: Genetics
TEST : 3
# UNIT VII: Genetics
# TN 12th Botany
Prepare / Learn
Q1.
The mechanism that causes a gene to move from one linkage group to another is called
A.
Translocation
B.
Crossing over
C.
Inversion
D.
Duplication
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Answer :
Option A
Explaination / Solution:
No Explaination.
# UNIT VII: Genetics
# TN 12th Botany
Prepare / Learn
Q2.
A point mutation comprising the substitution of a purine by pyrimidine is called
A.
Transition
B.
Translocation
C.
Deletion
D.
Transversion
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Answer :
Option D
Explaination / Solution:
No Explaination.
# UNIT VII: Genetics
# TN 12th Botany
Prepare / Learn
Q3.
Frameshift mutation occurs when
A.
Base is substituted
B.
base is deleted or added
C.
Anticodons are absent
D.
None of these
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Answer :
Option B
Explaination / Solution:
No Explaination.
# UNIT VII: Genetics
# TN 12th Botany
Prepare / Learn
Q4.
The distance between two genes in a chromosome is measured in cross-over units which represent
A.
Ratio of crossing over between them
B.
Percentage of crossing over between them
C.
Number of crossing over between them
D.
None of these
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Answer :
Option B
Explaination / Solution:
No Explaination.
# UNIT VII: Genetics
# TN 12th Botany
Prepare / Learn
Q5.
When a cluster of genes show linkage behaviour they
A.
do not show a chromosome map
B.
show recombination during meiosis
C.
do not show independent assortment
D.
induce cell division
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Answer :
Option C
Explaination / Solution:
No Explaination.
# UNIT VII: Genetics
# TN 12th Botany
Prepare / Learn
Q6.
Genetic map is one that
A.
Establish sites of the genes on a chromosome
B.
Establishes the various stages in gene evolution
C.
Shows the stages during the cell division
D.
Shows the distribution of various species in a region
View Solution
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Answer :
Option A
Explaination / Solution:
No Explaination.
# UNIT VII: Genetics
# TN 12th Botany
Prepare / Learn
Q7.
After a mutation at a genetic locus of the character of an organism changes due to the change in
A.
DNA replication
B.
Protein synthesis pattern
C.
RNA transcription pattern
D.
Protein structure
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Answer :
Option D
Explaination / Solution:
No Explaination.
# UNIT VII: Genetics
# TN 12th Botany
Prepare / Learn
Q8.
In a hexaploidy wheat, the haploid (n) and basic (x) numbers of chromosomes are
A.
n =21 and x =7
B.
n =7 and x =21
C.
n =21 and x =21
D.
n =21 and x =14
View Solution
Add Work Space
Answer :
Option A
Explaination / Solution:
No Explaination.
# UNIT VII: Genetics
# TN 12th Botany
Prepare / Learn
Q9.
Point mutation involves
A.
Deletion
B.
Insertion
C.
Change in single base pair
D.
duplication
View Solution
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Answer :
Option C
Explaination / Solution:
No Explaination.
# UNIT VII: Genetics
# TN 12th Botany
Prepare / Learn
Q10.
Which one of the following is a wrong statement regarding mutations?
A.
UV and Gamma rays are mutagens
B.
Change in a single base pair of DNA does not cause mutation
C.
Deletion and insertion of base pairs cause frame shift mutations
D.
Cancer cells commonly show chromosomal aberrations
View Solution
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Answer :
Option B
Explaination / Solution:
No Explaination.
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