Single-nucleotide polymorphisms (SNPs) are highly abundant markers, which are broadly distributed in animal genomes.
A single nucleotide alteration at a specific location in the genome is known as a single-nucleotide polymorphism in genetics. While some definitions call for the substitution must be present in a sizable enough portion of the population, many publications do not use this standard of frequency.
For instance, the G nucleotide may be present at a particular base position in the human genome in the majority of people, whereas an A may be present in a small percentage of people. This indicates an SNP, and the two potential nucleotide changes - G or A - are referred to as the alleles for this particular site.
SNPs identify variations in how susceptible we are to a variety of illnesses, such as age-related macular degeneration.
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