Answer:
Gene chips allowed scientists to evaluate multiple genes at one time; they could even look at an entire genome.
Step-by-step explanation:
A DNA chip is a tiny device with sensors capable of detecting DNA molecules in the sample being analyzed. These micro-laboratories are expected to allow advances in gene detection, laboratory analysis and health monitoring of people with a predisposition to disease. Today's DNA chips incorporate electrodes as sensors to detect DNA in the form of an electrochemical current that is transmitted to an automatic gene analyzer.
This allows scientists to evaluate multiple genes at the same time; thus contributing to a better understanding of the genome and better problem detection.