In continuation with the earlier posts (genetic/gel engineering and three errors)
Northern Blots shown below represents the presence of small RNA in the insect gut after feeding on dsRNA molecules. The pattern of bands corresponding to 50 and 21 nt, observed in these blots is unique as author played a trick which results in formation of these bands.
Your contribution or explanation is needed on the possible ways by which these bands are made.
This post is part of our ongoing quiz. Answers and winner name will be disclosed on 30th November 2018. Drop your answers as comments or by email at firstname.lastname@example.org.