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.
Erosion and Deposition. Jonah also learned that there were two other forces that also affect and form landforms. The first one is called erosion. He found that erosion is the movement of broken-down, weathered rock from place to place. His Dad took him to the garden, where there were channels made in the soft earth.