What is a gene
A gene is a length of DNA which means it is a sequence of DNA bases that codes for a polypeptide. Each gene occupies a specific Loci on a chromesome.
The Genetic code
The sequence of nucliotide bases on a gene provides a code with instruction for the construction of a polypeptide. The genetic code as a number of charateristics:
- It is a triplet code. A sequence of three nuceotide bases codes for an amino acid.
- It is a degenerate code. All amino acids ber form one or two have more than one code. Some codes dont correspond to an amino acid but…