Diversity, Classification and Variation- Mutations Flashcards
What do gene mutations involve?
A change in the DNA base sequence of chromosomes
What is a substitution mutation?
One base is substituted with another
What is a deletion mutation?
One base is deleted
What does the order of DNA bases in a gene determine?
The order of amino acids in a particular protein so if a mutation occurs then the sequence of amino acids it codes for could be altered
What does the degenerate nature of the genetic code mean?
Some amino acids are coded for by more than one DNA triplet
Why will some substitution mutations still code for the same amino acid?
They won’t always to changes in the amino acid sequence
What are mutagenic variations?
Things that can cause an increase in the rate of mutations
What are some examples of mutagenic agents?
Ultraviolet radiation, ionising radiation, some chemicals and some viruses
