In 1-2 sentences, describe what a sequence-tagged site (STS) is and how STSs are used in genome sequencing.

STS are short stretches of DNA used for producing genomic map

Explanation:

Sequence tagged sites (STS) are primers that possess some form of sequence knowledge and are used to produce genetic maps through standard mapping procedure. STS primers are short replica or stretch of DNA which is detected by using PCR array.

These STS primers are unique and sequence specific and thus are responsible for detecting variations in genomic DNA and can also distinguish between homozygotes and heterozygotes.