In Evolution: The Basics I gave the basics of evolution including mutations, natural selection and speciation in this I will go into further detail about these as well as go into genetic drift
Mutations
Mutations are random changes in the sequence of the nucleotide base pares (bases for short) of DNA. The bases are adenine (A), thymine (T), guanine (G), and cytosine (C). It is these that code your genes and it is your genes that determines your inherited traits (your hight, skin color, eye color, number of arms, number of legs, etc)
Causes of mutations
Mutations have two causes: damage to DNA and errors in the copying of the DNA when a cell divides. DNA can be damaged by certain forms of radiation (examples: ionizing radiation, ultraviolet radiation) and some chemicals (example: free radicals).
