A pure mutation is a type of genetic mutation that refers to the presence of mutations in both pairs of alleles. There are two types of mutations including heterozygous and pure mutations, where a pure mutation is one in which both alleles are mutated, as opposed to a heterozygous mutation, which is simply a mutation in one of the alleles. Pure heterozygous mutation is a mutation of a single gene in an allele. Pure heterozygous mutation is a mutation of a single gene in a pair of alleles, as opposed to heterozygous mutation, which is a mutation of one of the alleles. Pure heterozygous mutation is a mutation of a single gene in a pair of alleles, as opposed to heterozygous mutation, which is a mutation of one of the alleles. For further information, patients can seek the advice and guidance of their local medical professionals.