1. The problem statement, all variables and given/known data By running a DNA blast, we need to identify who is the grandmother, mother, and daughter. And how/why do we know their relationship. The tree is attached. 2. Relevant equations Here are some of the results from blast, I'm not sure if they will help: Group 1: Sequences: 2 Score:7298 Group 2: Sequences: 2 Score:7245 Group 3: Sequences: 3 Score:7127 Group 4: Sequences: 4 Score:7118 Group 5: Sequences: 2 Score:7448 Group 6: Sequences: 3 Score:7448 Group 7: Sequences: 4 Score:7354 Group 8: Sequences: 8 Score:7075 Group 9: Sequences: 10 Score:7108 Group 10: Sequences: 11 Score:7029 Group 11: Sequences: 12 Score:6977 3. The attempt at a solution Just by looking at the tree, my guess will be 4 is the grandmother, 6 is the mother, and either 9 or 13 is the daughter. However, I can't justify it. Where should I look? Any help is appreciated. Thank you all.