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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

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

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

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

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

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

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

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

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.

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




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