Hairpin loop structures are involved in both increasing or decreasing the number of repeats in a DNA sequence when replicated.What ultimately determines whether there will be an increase or decrease in daughter sequence repeat number?whether the hairpin loop forms on the template or the newly synthesized DNA.whether were is a stem$-$loop structure within the hairpin itself.whether the sequence is single, di$-,$ or tri$-$nucleotide repeats.if the DNA is complementary to another sequence.if miRNA can facilitate the hairpin to form.