Biology - Genetics - Advanced - Genetic mutations - Types of Gene Mutations

4 steps showing mutation types with a sentence analogy. Start with original: 'THE FAT CAT SAT' (each 3-letter word = a codon). Step 1: 'SUBSTITUTION - One base replaced by another. THE FAT CAT SAT → THE FAT CAR SAT. One 'letter' changed. May change one amino acid (missense), create a stop (nonsense)