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.
weathering, erosion, and deposition are a main force behind landscape types.  But they are not the only reason for a plain, plateau, and mountain region to form. o Other factors such as glaciation and tectonic activity lead to landscape building.