CSS :: Variations and Mutations
31.
Process related with mutations where one or more chromosome pieces may fail to re-unite and dissolve in cytoplasm is called:
A.
Inversion
B.
Translocation
C.
Deletion
D.
None of these
Answer: Option C
Explanation:
32.
During gametogenesis when one or more pieces of chromosome may reunite at wrong sites is called:
A.
Inversion
B.
Duplication
C.
Deletion
D.
None of these
Answer: Option B
Explanation:
33.
What is the name for event during gametogenesis when pieces of chromosome may reunite atcorrect sites but with wrong ends:
A.
Deletion
B.
Translocation
C.
Inversion
D.
Duplication
Answer: Option A
Explanation:
34.
"In chromosomal Aberration the change involves a considerable part of chromosome so that a number of genes are affected simultaneously". Whether this is:
A.
A correct statement
B.
Partially wrong statement
C.
Totally wrong statement
D.
No statement
Answer: Option A
Explanation:
35.
The rate of mutations can be increased by means of:
A.
Efficient Phototosynthesis
B.
Prolonged vegetative propagation
C.
X-rays
D.
Exposing roots to air
Answer: Option C
Explanation:
36.
In bacteria the mutations can be induced by:
A.
Exposure of organisms to high energy radiations
B.
Growing different strains in the same medium
C.
Adding all the required substances in nutrient medium
D.
Starving the bacteria
Answer: Option A
Explanation:
37.
Mutations among members of a species arise due to:
A.
Infection by micro-organisms
B.
Abrupt changes in genes
C.
Hybridization
D.
Dominance of one character of parents
Answer: Option B
Explanation:
38.
The mutations are mainly responsible for:
A.
Variations in the organisms
B.
Constancy in the organisms
C.
Genetic continuity between individual and offsprings
D.
Increasing population rate
Answer: Option A
Explanation:
39.
One cannot induce a specific gene to mutate as:
A.
Genes are located on chromosomes
B.
Genes are very small and not visible through compound microscopes
C.
It will be a very expressive process
D.
Scientists have yet not found any method and have not been able to do so.
Answer: Option D
Explanation:
40.
Concept of a sudden genetic change which breeds true in an organism is visualized:
A.
Independent assortment
B.
Variation
C.
Mutation
D.
Natural selection
Answer: Option C
Explanation:
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