Huella Genética - Genética

The video tutorial explains DNA profiling, a technique developed by Alec Jeffreys, which compares DNA samples to identify similarities and differences. It is used in crime solving and paternity tests by analyzing the 0.1% of DNA that varies among individuals. The process involves collecting samples, extracting DNA, amplifying it using PCR, and analyzing it through gel electrophoresis. The video includes case studies on crime scene investigation and identifying a soldier using DNA profiles.

What is the primary purpose of DNA fingerprinting as developed by Alec Jeffreys?

• To alter genetic sequences

• To map the entire human genome

• To create identical copies of DNA

• To compare genetic samples for similarities and differences

What are short tandem repeats (STRs) used for in DNA profiling?

• To sequence the entire genome

• To analyze variations in DNA sequences

• To determine the gender of an individual

• To identify the age of a DNA sample

Which technique is used to amplify DNA samples in the profiling process?

• Southern blotting

• Polymerase chain reaction (PCR)

• Gel electrophoresis

• Restriction enzyme digestion

In the crime scene example, how is the suspect identified?

• By matching fingerprints

• By comparing DNA band patterns

• By checking alibis

• By analyzing hair color

How is the identity of the soldier determined in the example provided?

• By using eyewitness accounts

• By analyzing DNA from the soldier's parents

• By comparing DNA with the soldier's belongings

• By matching dental records