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A footprint alone is not conclusive evidence because it may not definitively identify a specific individual. Footprints can be similar across multiple people or animals, and other factors like size variation, distortion, and contamination can affect the accuracy of footprint evidence. Additional evidence, such as DNA or eyewitness testimony, is typically needed to support the significance of a footprint in an investigation.
you need many copies of DNA for DNA fingerprinting
Yes, DNA fingerprinting is a powerful tool for solving crimes because it can definitively link a suspect to a crime scene or victim. DNA evidence is scientifically reliable and has high accuracy, which can help prosecutors secure convictions or help exonerate innocent suspects. However, it is important to consider the chain of custody and proper handling of DNA samples to ensure the integrity of the evidence.
DNA evidence can deteriorate due to exposure to heat, humidity, light, and contamination with substances like chemicals or microorganisms. Environmental factors such as sunlight, moisture, and high temperatures can break down DNA molecules over time, impacting their integrity and suitability for analysis. Additionally, improper storage and handling of DNA samples can compromise their quality and lead to degradation.
It will depend on the circumstances, but generally yes. For example, if another person's DNA is found at the scene, it is strong evidence in support of being found not guilty. ----------------------------------- If another person's DNA is found at a crime scene or on a victim, it strengthens the possibility of that person's being there or in contact with the victim, but, it could depend on the circumstances and the type of evidence. For example: - If the victim's hair has been found on a hairdresser's coat, chances are that the victim could have been his client. - However, if a man's semen was found on a rape victim's underwear, chances are pretty strong, but not 100 % sure, that he was the rapist. If the rapist used a condom, than the semen could have been the result of a willing encounter before or after the rape. Generally speaking, DNA should be supported by other evidence(s) as well.
Genetic factors(DNA)
DNA can last in hair for a long time, potentially thousands of years under the right conditions. Factors that can affect its preservation include exposure to sunlight, moisture, heat, and chemicals.
A footprint alone is not conclusive evidence because it may not definitively identify a specific individual. Footprints can be similar across multiple people or animals, and other factors like size variation, distortion, and contamination can affect the accuracy of footprint evidence. Additional evidence, such as DNA or eyewitness testimony, is typically needed to support the significance of a footprint in an investigation.
DNA forensic evidence can potentially last for many years on clothes if they are properly stored and preserved. Factors like exposure to sunlight, moisture, and chemical contaminants can degrade DNA over time, so evidence should be collected and stored in a controlled environment to ensure its longevity. Generally, DNA can be detected on clothes for several years if they are handled and preserved correctly.
There are many arguments for and against DNA evidence. One argument is that it cannot be disproved as deciding evidence.
The main factors affecting the rate of DNA migration in agarose gel electrophoresis include the size of the DNA fragments (smaller fragments migrate faster), the concentration of agarose in the gel (lower concentrations allow DNA to migrate faster), and the strength of the electric field applied (higher voltage leads to faster migration). pH and buffer composition can also affect migration rates.
Three factors that affect an organism's traits are genetics (inherited DNA), environmental conditions (such as temperature or availability of resources), and interactions with other organisms (such as competition or symbiosis).
There are two main factors that cause a mutation in DNA. These factors include: the DNA fails to accurately copy itself and external influence cause a breakdown in the DNA.
dna
DNA evidence says they are not.
DNA
you need many copies of DNA for DNA fingerprinting