Final answer:
Blood is typically the most useful bodily fluid for providing a full DNA profile because it contains a high concentration of white blood cells, which are rich in DNA. This allows for comprehensive DNA analysis used in crime-solving, paternity testing, and individual identification.
Step-by-step explanation:
The bodily fluid that is the most useful in providing a full DNA profile is typically blood. Blood provides a rich source of DNA thanks to the numerous white blood cells it contains. The unique DNA sequence found in these cells allows for a comprehensive analysis of an individual’s genetic makeup. Blood samples are thus commonly used in various applications, including crime-solving, paternity testing, and genetic testing to identify individuals uniquely. Other commonly used samples for DNA analysis include saliva and hair, although the concentration and quality of DNA may vary in comparison to blood. In the field of forensic genetics, blood or skin cells found at a crime scene can be matched to the DNA of a suspect to either implicate or exonerate them. The process often starts with the collection of a sample which is then subjected to DNA extraction and analysis using techniques such as PCR (Polymerase Chain Reaction) and gel electrophoresis to create a DNA fingerprint for comparison with known samples.