基因突变的分子机制

等位基因

An allele is one of two or more versions of DNA sequence (a single base or a segment of bases) at a given genomic location. An individual inherits two alleles, one from each parent, for any given genomic location where such variation exists. If the two alleles are the same, the individual is homozygous for that allele. If the alleles are different, the individual is heterozygous.

Difference between SNP and Mutation.

• Mutation：Mutation is the variation in DNA base pairs caused due to insertion, deletion, duplication or substitution of base pairs.
• SNP：SNP is a change in the single-nucleotide of a genome. Also, it is a type of mutation.