…… is a phenomenon by which genetic variations is achieved through changes in the base sequences with in genes, which creates a new character or trait absent in parental generation
a)	Apomixis	b)	Mutation	c)	Mutation breeding	d)	Heterosis

(b)

Mutation is a phenomenon by which genetic variation is achieved through changes in the base sequences with in genes, which creates a new character or trait absent in parental generation. Mutation which occur naturally are called spontaneous mutations and those which are induced artificially are called induced mutations. The application of induced mutation for crop improvement is called mutation breeding