Cold case files recently began re-investigating an old murder case. The murder took place in the park; a young man, James, was hit
over the head with a brick and killed. Police suspected the jealous former boyfriend of James' wife, Karen. Whoever killed James may
have washed their hands in a near-by bird bath as detectives found blood in the bird bath. Since the murder took place before DNA
fingerprinting was available, the suspected killer, Ronnie, went free. Detectives are now reviewing the blood evidence using DNA
fingerprinting
Based on the DNA fingerprints of all possible suspects, who is James' killer?
A. Aubrey
B. Babs
C. Karen
D. Ronnie

The killer is C; Karen

Explanation:

After looking at the birdbaths results and Karen's results, you can see that they are the same. This will make Karen the killer. Since the killer washed their hands in the birdbath, the detectives were able to get trace amounts of DNA.

DNA fingerprints are determined by a chemical test. This takes the persons genetic makeup and matches it with other peoples that are in a database. This type of DNA testing can be used in courts, identify bodies, find cures, and also look for missing people.

humans, along with other animals and plants, have linear chromosomes that are arranged in pairs within the nucleus of the cell. the only human cells that do not contain pairs of chromosomes are reproductive cells, or gametes, which carry just one copy of each chromosome.