Jake is undergoing a(n) , which takes advantage of the fact that blood flow increases in areas of the brain that are activated; specifically, hemoglobin carrying oxygen in the blood contains a ferrous (iron) molecule and therefore has magnetic properties.

fMRI

Explanation:

fMRI or functional magnetic resonance imaging is an imaging technique in which the brain activity can be monitored by observing the changes in the blood flow. The blood flow can be detected due to the presence of iron containing heme group present in the hemoglobin of the brain. The iron components are utilized to determine the magnetic property which further helps in diagnosis of the functional anatomy, stroke, diseases and abnormalities in the brain. This technique also helps in brain treatment.

her next move would be to use agarose gel electrophoresis to separate the dna molecules of varying length and create a dna fingerprint.