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21.

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

22.

Change in gene pattern bringing about variations may be due to:

A.	Random distribution of homologous genes in meiosis	B.	Phenomenon of crossing over
C.	Random union of gametes in fertilization	D.	All of these

23.

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

24.

Difference in somatogenic and blastogenic variations is that:

A.	Former mayor may not be inherited but later are always inherited	B.	Former are not inherited but later may be inherited
C.	Both are inherited compulsorily	D.	Both are not inherited

25.

Who considered variations as characters acquired by the organisms during their life-time:

A.	Darwin	B.	De Vries
C.	Dodson	D.	Lamarck

26.

Sudden changes in characteristics of organism due to chemical changes in their genetic materials are called:

A.	Variations	B.	Mutations
C.	Both (a) & (b)	D.	None of these

27.

Mutations were also called "Sports" by:

A.	Oparin	B.	Lamarck
C.	Darwin	D.	None of them

28.

The term "Saltatory or Discontinuous Variations" was used by Bateson for:

A.	Somatogenic changes occurring in organism during lifetime	B.	Sudden changes in the characteristics of organisms due to chemical changes in their genetic material
C.	Random union of gametes in fertilization	D.	Random distribution of homologous genes in meiosis

29.

"Gene Point Mutations" are:

A.	Changes in nucleotide sequence of DNA molecule usually at a single place affecting single gene	B.	Changes in chramosome effecting a number of genes simultaneously
C.	Alteration in number of chromosomes	D.	None of these

30.

Mutations occur during process of gametogenesis due to errors in chromosome duplication and crossing over by:

A.	Deletion process	B.	Translocation process
C.	Inversion process	D.	All of these processes