Allele arise by……………..
a) crossing over
b) mutation
c) genetic recombination
d) all of these
No variation if…………….. not occur.
a) crossing over
b) fertilization
c) genetic recombination
d) mutation
Mutation caused by………...
a) mutagenic chemicals
b) radiation
c) transposons
d) all of these
Mutation occur in…………..
a) DNA
b) Chromosomes
c) both a and b
d) none of these
Mutation occur in…………...
a) segment of chromosomes
b) whole segment
c) both a and b
d) none of these
Permanent change in DNA sequences is………
a) chromosomal mutation
b) gene mutation
c) both a and b
d) none of these
