What are SNPs? State their functions. [2 marks]

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Solution

SNPs are single nucleotide polymorphisms. These are changes in single nucleotide or differences in a single DNA base that differentiate two DNA sequences. [1 mark]

Their functions are
(1) They provide information in finding chromosomal locations for disease-associated sequences [½ mark]
(2) They help in tracing human history. [½ mark]

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