Conclusions how are new molecules of dna synthesized in living cells? what is the function of dna? if each individual has such a small amount of dna in their cells, how do the bands on the gel contain enough dna to be visible? humans only have a few eye colors and only four abo-based blood types. how can dna tests definitively identify individuals when many people have brown eyes or type a blood? suppose a suspicious hair was found in a victim’s home. a gel is set up with the dna fragments of two suspected criminals in lanes 4 and 5, the dna fragments of the suspicious hair in lane 3, and the victim’s dna fragments, as a negative control, are in lane 2. a dna ladder is in lane 1. the resulting gel is below. which suspect, if any, committed the crime? explain your answer.