BIO 231-Fall 2017 Summative Assessment #2 Unique Identifier: DO NOT put your name on your exam. Use your Unique Identifier instead. The first three letters of your mother’s maiden name The fifth and sixth numbers in your Pace University ID The first three letters of your father’s name 1. A is a DNA sequence variation occurring when a single nucleotide adenine (A), thymine (T), cytosine (C), or guanine (G]) in the genome (or other shared sequence) differs between members of a species or paired chromosomes in an individual. is when the number of copies of a particular gene varies from 2. one individual to the next. 3. Label the following chromosomal abnormalities (4 points).