Single nucleotide polymorphisms of the human genome are responsible for diversity.
A single nucleotide substitution at a specific location in the genome is known as a single nucleotide polymorphism. SNPs, or single nucleotide polymorphisms, are the most prevalent form of genetic variation in humans. SNPs typically occur all over a person's DNA. For example, an SNP could replace the nucleotide cytosine (C) with the nucleotide thymine in a specific region of DNA (T).
Many people have these variants; nevertheless, for a variation to be called an SNP, it must be present in at least 1% of the population. This SNP is responsible for that 0.1% difference in human DNA to cause diversity.
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