Gene expression and Mutations

• Mutation= a change in the DNA sequence of a gene, are a result from errors in DNA replication
• Insertion Mutation= Type of mutation involving an addition of one or more nucleotides into segment of DNA
• Deletion mutation= Type of mutation where a part of a nucleotide in a sequence of DNA is left out of replication
• Non-coding DNA= DNA that does not code for amino acids and is not transcribed into mRNA and can be switched on and off
• Gene regulation= The process of turning genes on and off in response to external or internal signals
• Substitution Mutation= Type of mutation where one nucleotide is replaced by a different one (A-T, C-G)