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Why do police use hair blood or fingerprints for DNA?
Because those personal bodily samples (among others) contain samples of the cell structure call DNA which is unique to every person on earth. The statistical odds of two people having the exact same DNA (EVEN identical twins) is so astronomical as to be insignificant.
DNA samples for human DNA fingerprinting can be obtained from?
DNA samples for human DNA fingerprinting can be obtained from a variety of sources, including blood, saliva, hair follicles, and skin cells. These samples contain DNA that can be used for analysis and comparison to create a unique genetic profile for each individual.
Is it possible to extract DNA from blood samples?
Yes, it is possible to extract DNA from blood samples. This process involves isolating the DNA molecules from the blood cells and purifying them for analysis or testing.
How does genealogy DNA work to compare the relationships?
Genealogy DNA works to compare relationships by tracking alleles in the mitochondria of DNA. By analyzing these samples, one can determine the genetic closeness of various people.
Where can scientists get DNA from?
Scientists can obtain DNA from various sources such as blood samples, saliva, hair roots, skin cells, and tissue samples. These samples contain cells that can be used to extract and analyze DNA. Additionally, DNA can also be obtained from organisms such as bacteria, plants, and animals for research purposes.
How does DNA help in solving crime?
Police and other crime investigation workers can take DNA from the scene of the murder (or other crime) and check it with databases of other DNA samples and match it to a person(s) and then they have their suspect(s).
What makes many copies of a DNA samples?
The polymerase chain reaction machine (often known as the PCR machine) can create an indefinite amount of copies of DNA samples.
How do DNA samples help the csi?
CSI can use DNA samples to link a suspect to a crime scene or victim. By analyzing the unique DNA profile from a sample, investigators can identify individuals with a high degree of accuracy. This helps in solving crimes and providing evidence for prosecution.
How is DNA extracted from blood samples?
DNA is extracted from blood samples by first breaking open the cells to release the DNA. Then, the DNA is separated from other cellular components using a series of chemical and physical methods. Finally, the purified DNA is collected and can be used for various genetic analyses.
What are some possible problems or sources of error related to DNA fingerprinting?
Possible problems or sources of error in DNA fingerprinting include contamination of samples, degradation of DNA samples, mislabeling of samples, and human error during the analysis process. These issues can lead to inaccurate results and misidentification of individuals.
Where do you place the DNA samples on the gel during electrophoresis?
During electrophoresis, DNA samples are placed at the wells of the gel. The gel is then subjected to an electric current, causing the DNA fragments to move through the gel based on their size.
Compare the banding patters formed on each lane of the gel do you think the three DNA samples tested are the same explain how can you further verify wheter or no any of the DNA samples tested are?
To compare banding patterns, visually inspect the gel lanes for the presence and position of bands. Similar banding patterns suggest similar DNA samples. To further verify if the DNA samples are the same, you can perform additional tests such as sequencing or restriction enzyme analysis for confirmation.
