A sudden heritable change is called:
A.Mutation
B.Seggregation
C.Variation
D.None of these
Category: Variations and Mutations Mcqs
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
Quantitative discontinuous variations are positive when:
A.The number of some variant part is normal
B.The number of some variant part is more than normal
C.The number of some variant part is less than normal
D.The number of some variant part is unaffected
In absence of of organic evolution there world have been:
A.No specification
B.Only one species on the earth
C.Absence of variations
D.All of these
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:
A.Antlers of Irish Elks
B.Teeth of Swedolon
C.Both (a) & (b)
D.None of these
Which of the following chemicals can induce mutations:
A.Caffeine
B.Camphor
C.Morphine
D.All of these
Mutations are respobsible for bringing:
A.Large variations in the organisms
B.Very minute undetectable variations in organism
C.Better as well as useful changes in organisms
D.Increase in population rate
Presence of only four digits in hand will be an example of:
A.Negative quantitative discontinuousvariations
B.Positive quantitative discontinuous variations
C.Positive quantitative continuous variations
D.Negative quantitative continuous variations
If all the organisms would have inherited same genotype there would have been:
A.No evolution
B.Better evolution
C.Special type of evolution
D.Something else
Role of nutation in the process of organic evolution is:
A.Reproductive isolation
B.Genetic variation
C.Genetic drift
D.None of these
