1 - A mutation means:
A change that is inherited
2 - A sudden heritable change is called:
Mutation
3 - All somatogenic variations are:
Always non-heritable
4 - Ancon sheep of Sethwright's Farm in Massachusetts (America) is example of:
Substantive discontinuous variation
5 - Change in gene pattern bringing about variations may be due to:
All of these
6 - Concept of a sudden genetic change which breeds true in an organism is visualized:
Mutation
7 - Continuous variations are small variations from one extreme to the other which are always found amongst members on a same species like variations in shape, colour size, weight etc. These were considered heritable and 'raw materials' for evolution by:
Charles Darwin
8 - Currently it is held that somatic variations are not inherited, while heritable mutations which help organism in adoption are selected by ""Nautre"" and get maximum chance for transmission to future generations and form basis of evolution. State whether this statement is:
Correct
9 - Determinate variations are also called:
Orthogenic variations
10 - Determinate variations are controlled by strong genes or their recombination which are often so strong that the characters continue to develop beyond usefulness, to bearer and ultimately bring extinction of the species. The example of such are:
Both (a) & (b)
11 - Determinate variations are:
Adaptive and selective variations of definite evolutionary lines
12 - Difference in somatogenic and blastogenic variations is that:
Former mayor may not be inherited but later are always inherited
13 - Discontinuous variations are:
Mutations
14 - Discontinuous variations are:
Sudden and heritable
15 - During gametogenesis when one or more pieces of chromosome may reunite at wrong sites is called:
Duplication
16 - EOLOGICAL Time Scale"" represents:
Chronological order of earth's history
17 - Gene Point Mutations"" are:
Changes in nucleotide sequence of DNA molecule usually at a single place affecting single gene
18 - Generally the mutations are:
Harmful
19 - Hereditary variations can be produced in plants by using:
Gibberellic Acid
20 - If all the organisms would have inherited same genotype there would have been:
No evolution
21 - In absence of of organic evolution there world have been:
All of these
22 - In bacteria the mutations can be induced by:
Exposure of organisms to high energy radiations
23 - In chromosomal Aberration the change involves a considerable part of chromosome so that a number of genes are affected simultaneously"". Whether this is:
A correct statement
24 - In which of the following conditions of gene, the pregnancy of mutant gene is expected to increase in a population:
Dominance
25 - Muller induced mutation in Drosophila melanogester by exposure to:
X-rays
26 - Mutations among members of a species arise due to:
Abrupt changes in genes
27 - Mutations are respobsible for bringing:
Large variations in the organisms
28 - Mutations in an organism are:
Changes that are inheritable
29 - Mutations occur during process of gametogenesis due to errors in chromosome duplication and crossing over by:
All of these processes
30 - Mutations were also called ""Sports"" by:
Darwin
31 - One cannot induce a specific gene to mutate as:
Scientists have yet not found any method and have not been able to do so.
32 - Ordinarily the continuous variations are considered:
Heritable or non-heritable
33 - Presence of only four digits in hand will be an example of:
Negative quantitative discontinuousvariations
34 - Process related with mutations where one or more chromosome pieces may fail to re-unite and dissolve in cytoplasm is called:
Deletion
35 - Quantitative discontinuous variations are positive when:
The number of some variant part is more than normal
36 - Role of nutation in the process of organic evolution is:
Genetic variation
37 - Somatogenic variations are dissimilarities which:
Confine to 'soma' only and are inheritable
38 - Sudden changes in characteristics of organism due to chemical changes in their genetic materials are called:
Mutations
39 - The mutations are mainly responsible for:
Variations in the organisms
40 - The rate of mutations can be increased by means of:
X-rays
41 - The term ""Saltatory or Discontinuous Variations"" was used by Bateson for:
Sudden changes in the characteristics of organisms due to chemical changes in their genetic material
42 - There would have been no organic evolution if:
Individuals in a population did not show gene variation
43 - Variations are:
All the dissimilarities
44 - What is the name for event during gametogenesis when pieces of chromosome may reunite atcorrect sites but with wrong ends:
Deletion
45 - Which of the following are somatogenic variations:
All of these
46 - Which of the following chemicals can induce mutations:
All of these
47 - Which of the following is not an example of somatogenic variation:
Birth of monstrous babies in progenies of people of Hiroshima and Nagaski
48 - Which of the following is not the example of positive quantitative variations:
Presence of two ear pinnae in man
49 - Who considered variations as characters acquired by the organisms during their life-time:
Lamarck
50 - Who demonstrated development of important variations in mice reared at 5?C and 21?C:
Tower and Agar
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