Using a computer model, Petrie found that the greater genetic diversity created by mutations that affect DNA repair outweighed the decrease in diversity arising from sexual selection.

• 利用计算机模型，皮特里发现了影响DNA修复流程的基因突变所导致的更显著的遗传多样性。它消除了配偶选择带来的差异性减少的因素。