Question

How many repeats are there for this STR? Refer to the following DNA sequence to answer the questions: CTAGAAGCTTAAAGCTTCATCATCATCATCATCATCATTTAAGCTTCAAAGCTT

Answer 1

The number of repeats within an STR is referred to as an allele. For instance, the STR known as D7S820, found on chromosome 7, contains between 5 and 16 repeats of GATA. Therefore, there are 12 different alleles possible for the D7S820 STR.