How are DNA fingerprints obtained from a bloodstain used in forensic analysis?
A. By comparing the bloodstain's DNA profile to known DNA samples to identify or exclude potential suspects.
B. By measuring the bloodstain's chemical composition to match it with a database of known substances.
C. By analyzing the bloodstain's volume and concentration to determine its source.
D. By examining the bloodstain's color and texture to link it to a specific crime scene.

By comparing the bloodstain's DNA profile to known DNA samples to identify or exclude potential suspects.

This is the correct answer. DNA fingerprinting analyzes unique genetic markers in the bloodstain to create a profile. This profile can then be compared to the DNA profiles of suspects or victims to determine a match

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darrenl37843 darrenl37843 · Answer 2 · 2024-08-01T11:13:13-04:00

Answer: A. By comparing the bloodstain's DNA profile to known DNA samples to identify or exclude potential suspects.

Explanation: The purpose of DNA fingerprinting is to extract DNA from the remains of a crime scene and compare it with out samples to determine the identities of victims and possible suspects. This is only possible because everyone's DNA is unique. Every individual has unique DNA sequences and a genome. Thus, it is possible for us to single out individuals based on their genomic makeup. As a result, DNA comparisons are done in criminal investigations to determine possible suspects.

Choice b is incorrect because DNA fingerprinting doesn't involve comparing chemical compounds found in the blood. This process is more so suited for a toxicologist that may be interested in what substances or chemicals could be present in the blood of a victim or suspect.

Choice C is incorrect because DNA fingerprinting does not involve analysis of blood volume or concentration. Choice C's type of blood analysis would be used to determine what type of animal blood came from, and would not be helpful in forensic analysis.

Choice D is incorrect because DNA fingerprinting doesn't involve analyzing bloodstain color or texture. In fact, this type of analysis would only determine how the blood may have been spilt, but doesn't involve the use of DNA in doing so.