Gene Flow And Genetic Drift Test

Gene Flow And Genetic Drift

This is online test 01 for CBSE class 12 Biology Evolution (Gene flow and genetic drift).. There are 10 questions in this test with each question having around four answer choices.

Questions & Answers

1
Which one of the followings is also called Sewall Wright Effect?
  • A
    Isolation
  • B
    Genetic drift
    Correct
  • C
    Gene flow
  • D
    Gene pool
2
Praying mantis is a good example of
  • A
    Camouflage
    Correct
  • B
    Social insects
  • C
    Mullerianmimcry
  • D
    Warning colouration
3
The animals of cold countries have relatively shorter and poorly developed ear, eyes, hair and other phenotypic characters. This is known by which law?
  • A
    Dollo’s law
  • B
    Allen’s law
    Correct
  • C
    Cope’s law
  • D
    Bergmann’s law
4
Adaptive ability is inherited because
  • A
    It has genetic basis
    Correct
  • B
    It appears due to mutation
  • C
    It is acquired trait
  • D
    It make organism suitable to particular environment
5
How is extinction represented in a tree diagram?
  • A
    A branch shifts along the X axis
  • B
    A branch shifts along the Y axis
  • C
    A branch splits
  • D
    A branch ends
    Correct
6
Which of the following is a living fossil?
  • A
    Saacharomycetes
  • B
    Spirogyra
  • C
    Cycas
    Correct
  • D
    Moss
7
Which of the following is an example of genetic variation?
  • A
    Two children have different eye colors
    Correct
  • B
    Todd eats meat, but his brother Rod is a vegetarian
  • C
    One person has a scar, but her friend does not
  • D
    One person is older than another
8
The tendency of population to remain in genetic equilibrium may be disturbed by
  • A
    Lack of random mating
    Correct
  • B
    Lack of migration
  • C
    Random mating
  • D
    Lack of mutations
9
Genetic drift is found in
  • A
    Plant population
  • B
    Large population with random mating
  • C
    Animal population
  • D
    Small population with or without mutated genes
    Correct
10
Which one of the followings is incorrect about genetic drift?
  • A
    A mechanism for the evolution of new species
  • B
    Significant only in large population
    Correct
  • C
    Founder effect is a special case
  • D
    Random change in allele frequency in a population