What does it mean to be purebread ?

If you meant purebred, it means that the species had not been bred with any other species than it`s own.

Ex: a purebred dog bred with another purebred dog produced a purebred offspring

a purebred dog bred with either another species of dog, or a crossbred dog will produce a crossbred offspring

Explanation:

pure breed means common of its kind not have had mates with any other kind

image result for describe the various types of gene mutationsghr.nlm.nih.gov

the types of mutations include: missense mutation: this type of mutation is a change in one dna base pair that results in the substitution of one amino acid for another in the protein made by a gene. nonsense mutation: a nonsense mutation is also a change in one dna base pair.

explanation: