Practice question

Tandem repeats are categorized by repeat unit length and organization. Short Tandem Repeats have 1-6 bp motifs constituting microsatellites. Variable Number Tandem Repeats correspond to minisatellites bearing 10-100 bp motifs repeated many times in arrays, frequently located at telomeric and subtelomeric regions, showing substantial allele size variation detectable by Southern blotting and electrophoresis. Indels are small insertions or deletions, SNPs are single-base substitutions. VNTR terminology directly denotes 10-100 bp repeat organization, distinguishing it from shorter microsatellite STRs and larger macrosatellite arrays exceeding 100 bp per unit.