[Campbell Biology P.476] Which statement accurately describes a Single Nucleotide Polymorphi... | Practice Question
Which statement accurately describes a Single Nucleotide Polymorphism SNP based on the provided text?
A: SNPs directly cause diseases by altering the encoded protein in most cases.
B: A SNP is a single base-pair variation found in at least 1% of the population and can be used as a genetic marker.
C: SNPs are primarily identified by sequencing the entire DNA of large numbers of people.
D: SNPs are found in over 99% of the human genome's nucleotide positions.
Explanation
The definition of a SNP is provided: 'A single base-pair site where variation is found in at least 1% of the population'. The text also clearly states that 'the SNP acts as a genetic marker'.