AP BIOLOGY

Detailed explanation-1: -(myoo-TAY-shun) Any change in the DNA sequence of a cell. Mutations may be caused by mistakes during cell division, or they may be caused by exposure to DNA-damaging agents in the environment.

Detailed explanation-2: -Harmful mutations may cause genetic disorders or cancer. Beneficial mutations are essential for evolution to occur. They increase an organism’s changes of surviving or reproducing, so they are likely to become more common over time. A genetic disorder is a disease caused by a mutation in one or a few genes.

Detailed explanation-3: -There are three types of DNA Mutations: base substitutions, deletions and insertions. 1. Base Substitutions. Single base substitutions are called point mutations, recall the point mutation Glu—–> Val which causes sickle-cell disease. Point mutations are the most common type of mutation and there are two types.