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Evolution

288 Questions Start Allen Test
All Exams Allen
Q51 Allen THEORIES OF ORGANIC EVOLUTION MCQ
A Scientist kept 69 generations of Drosophila in darkness even after that the flies had normal eyes, this disproves the law of :
A.
Synthetic theory
B.
Natural selection
C.
Germplasm theory
D.
Acquired characters are inherited
Q52 Allen THEORIES OF ORGANIC EVOLUTION MCQ
The ultimate source of variation is :
A.
Mutation
B.
Sexual reproduction
C.
Natural selection
D.
Hormonal action
Q53 Allen THEORIES OF ORGANIC EVOLUTION MCQ
Which is the most important factor for evolution of new species ?
A.
Geographic isolation
B.
Extensive in-breeding
C.
Reproductive isolation
D.
Adaptation
Q54 Allen THEORIES OF ORGANIC EVOLUTION MCQ
Gene pool is :
A.
Genotype of an individual of a population
B.
Different genes of all individuals of a species found in an area
C.
Pool of artificially synthesised genes
D.
Genes of a genus
Q55 Allen THEORIES OF ORGANIC EVOLUTION MCQ
Which of the following evidences does not favour the Lamarckian concept ?
A.
Absence of limbs in snakes
B.
Presence of webbed toes in aquatic birds
C.
Melanization in peppered moth in industrial area
D.
Lack of pigment in cave dwelling animals
Q56 Allen THEORIES OF ORGANIC EVOLUTION Match the Columns
Match the following columns and find correct combination :
Match Column-I with Column-II
Column-IColumn-II
(A)Darwin
(B)De Vries
(C)Pasteur
(D)Fox
(P)Mutation theory
(Q)Protobiont
(R)Origin of species
(S)Special Creation
(T)Swan-Necked Flask Experiment
A.
A = R, B = P, C = T, D = Q
B.
A = P, B = Q, C = R, D = S
C.
A = T, B = R, C = Q, D = P
D.
A = R, B = T, C = P, D = Q
Q57 Allen THEORIES OF ORGANIC EVOLUTION MCQ
Frequency of an allele in an isolated population may change due to :-
A.
Genetic drift
B.
Gene flow
C.
Mutation
D.
Natural selection
Q58 Allen THEORIES OF ORGANIC EVOLUTION MCQ
There are two alleles (Aā‚& Aā‚‚) out of which one (Aā‚) has nil abundance in a population then the abundance of second allele (Aā‚‚) is
A.
0.25
B.
1.00
C.
0.40
D.
0.50
Q59 Allen THEORIES OF ORGANIC EVOLUTION MCQ
The migration of gene in to a population from other population by interbreeding is called :-
A.
Gene pool
B.
Gene flow
C.
Genetic drift
D.
Gene erosion
Q60 Allen THEORIES OF ORGANIC EVOLUTION MCQ
Equilibrium of gene frequencies is :-
A.
$\mathsf { P } ^ { 2 } \times 2 \mathsf { P } \mathsf { q } \times \mathsf { q } ^ { 2 } = 1$
B.
$\sigma = { \sqrt { \frac { \mathsf { P q } } { \mathsf { N } } } }$
C.
Hardy Weinberg law
D.
Mutation
Q61 Allen THEORIES OF ORGANIC EVOLUTION MCQ
In a random mating population of 28,800 individuals, percentage of dominant homozygous individuals is 49% find out the percentage of heterozygous individuals :
A.
21%
B.
42%
C.
32%
D.
9%
Q62 Allen THEORIES OF ORGANIC EVOLUTION MCQ
In a population that is in Hardy Weinberg equilibrium, the frequency of a recessive allele for a certain hereditary trait is 0.20. What percentage of the individual in the next generation would be expected to show the dominant trait :-
A.
16%
B.
32%
C.
64%
D.
96%
Q63 Allen THEORIES OF ORGANIC EVOLUTION MCQ
In a random mating population frequency of disease-causing recessive allele is 80%. What would be the frequency of carrier individuals in population :-
A.
64%
B.
32%
C.
16%
D.
100%
Q64 Allen THEORIES OF ORGANIC EVOLUTION MCQ
In a random mating population frequency of dominant allele is 0.7. What will be the frequency of recessive phenotype :ā€”
A.
0.49
B.
0.09
C.
0.3
D.
0.21
Q65 Allen THEORIES OF ORGANIC EVOLUTION MCQ
At a particular locus, frequency of 'A' allele is 0Ā·6 and that of 'a' is 0Ā·4. What would be the frequency of heterozygotes in a random mating population at equilibrium :-
A.
0Ā·24
B.
0Ā·16
C.
0Ā·48
D.
0Ā·36
Q66 Allen THEORIES OF ORGANIC EVOLUTION MCQ
The existence within a population of nonbeneficial alleles in heterozygous genotype is:
A.
genetic load
B.
genetic drift
C.
genetic flow
D.
selection
Q67 Allen THEORIES OF ORGANIC EVOLUTION MCQ
Some bacteria are able to grow in Streptomycin containing medium due to -
A.
Natural selection
B.
Induced mutation
C.
Reproductive isolation
D.
Genetic drift
Q68 Allen THEORIES OF ORGANIC EVOLUTION MCQ
Which of the following is important for speciation ?
A.
Seasonal isolation
B.
Reproductive isolation
C.
Behavioural isolation
D.
Tropical isolation
Q69 Allen THEORIES OF ORGANIC EVOLUTION MCQ
Genetic drift rapidly operates in :-
A.
Small isolated population
B.
Large isolated population
C.
Fast reproductive population
D.
Slow reproductive population
Q70 Allen THEORIES OF ORGANIC EVOLUTION MCQ
De Vries gave his mutation theory on organic evolution while working on ā€“
A.
Oenothera lamarckiana
B.
Drosophila melanogaster
C.
Pisum sativum
D.
Althea rosea
Q71 Allen THEORIES OF ORGANIC EVOLUTION MCQ
Which of the following factors help in evolution but is not considered as the basic factor for evolution?
A.
Isolation
B.
Adaptation
C.
Variation
D.
Mutation
Q72 Allen THEORIES OF ORGANIC EVOLUTION MCQ
Factors helps in the formation of new species are:
A.
competition and variation
B.
isolation and competition
C.
competition and mutation
D.
isolation and mutation
Q73 Allen THEORIES OF ORGANIC EVOLUTION MCQ
The idea not related to the Darwinian evolutionary theory is :
A.
survival of the best
B.
struggle for existence
C.
inheritance of acquired characters
D.
origin of species by natural selection
Q74 Allen THEORIES OF ORGANIC EVOLUTION MCQ
Inheritance of acquired characters comes from :
A.
Lamarckism
B.
Darwinism
C.
Neo-Lemarckism
D.
Neo-Darwinism
Q75 Allen THEORIES OF ORGANIC EVOLUTION MCQ
Coverstone of theory of Darwin was :
A.
natural selection
B.
inheritance of acquired characters
C.
omnis cellulae e cellulae
D.
higher productivity