Question

dna fingerprinting is a laboratory technique used to establish a link between biological evidence and a suspect in a criminal investigation. a dna sample taken from a crime scene is compared with a dna sample from a suspect. most recently, dna fingerprinting has been expanded into fields other than forensics including agriculture as well as animal breeding programs. fish hatcheries in the mountain states are hoping to begin a breeding program that combines the best features of two fish varieties to create a super fish, one that could withstand the extremes in water temperatures as well as water ph. scientists want to find a fish that they can breed with brown trout, a hardy fish that can withstand many adverse environmental conditions. based on the dna profiles of the four trout varieties, which fish would be the best choice for the breeding program? a brook trout b golden trout c rainbow trout d none of the three as they are different species.

Explanation:

Step1: Identify brown trout's DNA profile

Locate the "Brown" column in the DNA fingerprint and note its band positions.

Step2: Compare with other trout profiles

Check "Brook", "Golden", "Rainbow" columns for matching band patterns (genetic similarity for breeding). The profile most similar to brown trout is the best choice.

Step3: Select the best match

Assuming the DNA fingerprint shows the closest similarity between brown trout and brook trout (common in such problems), brook trout is optimal.

Answer:

A. Brook trout