Who demonstrated development of important variations in mice reared at 5?C and 21?C:
A.Darwin and Walliace
B.Tower and Agar
C.Huxley and Muller
D.Bateson and Punett
Category: Variations and Mutations Mcqs
Determinate variations are:
A.Continuous variations
B.Somatogenic variations
C.Adaptive and selective variations of definite evolutionary lines
D.None of these
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:
A.Mendel
B.Charles Lyell
C.Charles Darwin
D.All of these
Determinate variations are also called:
A.Continuous variations
B.Orthogenic variations
C.Both (a) & (b)
D.None of these
Which of the following is not the example of positive quantitative variations:
A.Six arm in starfish
B.14 pairs of ribs in man
C.Presence of six fingers in man
D.Presence of two ear pinnae in man
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
Organic variations occur ultimately through:
A.Sexual reproduction
B.Sexual selection
C.Natural selection
D.Mutation
Ordinarily the continuous variations are considered:
A.Heritable
B.Non-heritable
C.Heritable or non-heritable
D.None of these
Mutations in an organism are:
A.Changes that are heritable
B.Changes that are inheritable
C.Changes that mayor may not be heritable
D.Characters acquired by organisms during their lifetime
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
