Most mutations produce harmful effects but in few instances, mutations produce good effects.
A mutation is a change that occurs in the sequence of nucleotides in a DNA molecule.
The nucleotides in DNA molecules are transcribed to mRNA molecules.
In protein synthesis using mRNA molecules, the nucleotides are read in set of triplets known as codons.
Each codons codes for a specific amino acid.
Any mutation that results in the changes in the codons will result in synthesis of protein molecules different from the original protein.
Most mutations produce harmful effects as in such instances as:
sickle cell anaemia
cystic fibrosis, etc.
In few instances, mutations produce good effects such as in development of resistance to diseases.
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