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.
This forces the clouds to release the precipitation in the form of thunderstorms in the summer and severe snowstorms in the winter. The orographic effect occurs on the windward side -- the side that faces the wind. Rain Shadow. The leeward side of the mountain typically has a rain shadow. The rain-shadow side has significantly less rainfall than the windward side. This is due to the orographic effect, which has basically squeezed out the moisture from the air as it traveled over the peak of the mountain.