Answer
A SNP that is physically close on a DNA strand to the disease-associated allele is said to be “linked” to the allele.
Work Step by Step
The probability of crossover between two very close nucleotides is much lower than that of nucleotides that are farther apart due to the lower number of places the strand could separate. Because of this, a very close SNP is likely to be present anywhere that the disease-associated allele is also present.
