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41.

A sudden heritable change is called:

A.	Mutation	B.	Seggregation
C.	Variation	D.	None of these

42.

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

43.

In which of the following conditions of gene, the pregnancy of mutant gene is expected to increase in a population:

A.	Dominance	B.	Recessiveness
C.	Both (a) & (b)	D.	None of these

44.

A mutation means:

A.	A change that is inherited	B.	A change affecting only the parents but never inherited
C.	A change responsible for growth of organism	D.	A change affecting the offsprings in F2, generation

45.

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

46.

Generally the mutations are:

A.	Dominant	B.	Recessive
C.	Useful	D.	Harmful

47.

Role of nutation in the process of organic evolution is:

A.	Reproductive isolation	B.	Genetic variation
C.	Genetic drift	D.	None of these

48.

Currently it is held that somatic variations are not inherited, while heritable mutations which help organism in adoption are selected by "Nautre" and get maximum chance for transmission to future generations and form basis of evolution. State whether this statement is:

A.	Wrong	B.	Partially wrong
C.	Correct	D.	None of these

49.

Muller induced mutation in Drosophila melanogester by exposure to:

A.	Alpha-rays	B.	Beta-rays
C.	X-rays	D.	None of these

50.

Which of the following chemicals can induce mutations:

A.	Caffeine	B.	Camphor
C.	Morphine	D.	All of these