The statement mutations affect protein synthesis which impacts the way traits are expressed' BEST supports the claim that mutations are a source of inheritable genetic variation.
A mutation in biology is a change in the nucleic acid sequence of an organism's, virus's, or extrachromosomal DNA's genome. Viral genomes can comprise either DNA or RNA. Mutations occur as a result of errors in DNA or viral replication, mitosis, or meiosis, or other types of DNA damage (such as pyrimidine dimers caused by ultraviolet radiation exposure), which may then undergo error-prone repair (particularly microhomology-mediated end joining), cause an error during other forms of repair, or cause an error during replication (translesion synthesis). Mutations can also occur as a result of mobile genetic elements insertion or deletion of DNA segments. Mutations can cause detectable changes in an organism's observable traits (phenotype). Mutations are involved in both normal and pathological development.
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