Changes in DNA are called ___, which can cause a different _ to be made.

A gene mutation is a permanent alteration in the DNA sequence that makes up a gene, such that the sequence differs from what is found in most people. Mutations range in size; they can affect anywhere from a single DNA building block (base pair) to a large segment of a chromosome that includes multiple genes.

Explanation:

meiosis is the first to occur after the nuclei of opposite of opposite mating types fuse