For example, the number of strands in the backbone of the helix (Crick suspected 2 strands, but cautioned Watson to examine that more critically), the location of the base pairs (inside the backbone or outside the backbone), etc.
Dǎɣ asikin, hadi ən asidwil dǎɣ ɣasan ən adibel (Criək aɣel as 2 sidwal, mašan eqtal Watson ye adikyid awen dǎɣ əmik ogaran tizmit), ugišawan ən əsin ən santo (dǎɣ amas ən ɣasan), iyad.