1 Insertion â when a base is added to the sequence. 2  Deletion â when a base is deleted from the sequence.  Copy number variation (CNV) is a type of mutation where large chunks of DNA are inserted, repeated or lost. These regions of DNA can be between 10,000 and 5,000,000 bases long.
Wind deposition can result in dunes and loess deposits.
Crescentic dunes are the first dune type to form. They occur transverse to the wind where sand is abundant and the wind blows from one main direction (Lancaster, 1996). Crescentic dunes are those relevant to this experiment because the set up will favor the forming of this type.