Complex sentence: Morissette Amon is a dramatic soprano, whose vocal range spans five octaves and five notes (C3-G7) and she also has a whistle register, and her wide vocal range is considered to be akin to that of Mariah Carey.
Split into simpler sentences: Morissette Amon is a dramatic soprano, whose vocal range spans five octaves and five notes (C3-G7) and she also has a whistle register. Her wide vocal range is considered to be akin to that of Mariah Carey.