3.30 Mutation

• The base sequence ( A,C,T,G,A,A,C,C) of a DNA is what constitute the gene. 
• The form of the gene is called an allele.
• Certain events and certain processes can result in a change in the base sequence .

->  This change create a new version of the allele  and it is possible that this process will result in an entirely different protein and therefore creating an entirely different phenotype ( how it looks).

The reasons why dominant alleles and recessive alleles exist is because of this process.