Point mutation is induced by:
1. Adenine
2.  Guanine
3.  3-cytosine
4.  5-bromouracil

Multivalent chromosome is formed by:
1.  Inversion
2.  Deletion
3.  Reciprocal translocation
4.  Point mutation

What change occurs by changing one base in DNA:
1.  Always a change of one amino acid in protein
2.  Change in complex sequence of amino acid
3.  Always a change in property of protein
4.  Does not necessarily change the phenotype

Minor change in a gene's structure is called:
1.  Reversible mutation
2.  Point mutation
3.  Forward mutation
4.  Backward mutation

Most of the mutations are:

1. Harmful

2. Harmful and recessive

3. Beneficial

4. Dominant

Change in the sequence of nucleotides in DNA is called:

1. Mutagen

2. Mutation

3. Recombination

4. Translation

One of the parents of a cross has a mutation in its mitochondria. In that cross, that parent is taken as a male. During the segregation of $F_2$ progenies that mutation is found in:

1. None of the progenies

2. All the progenies

3. 50% of the progenies

4. 1/3 of the progenies