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Why footprint is not conclusive evidence?
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.
Why was it difficult to use DNA as evidence in a crime pcr was invented?
you need many copies of DNA for DNA fingerprinting
Do you think DNA fingerprinting is good evidence for solving crimes. why or why not?
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.
What causes DNA evidence to deteriorate?
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.
Is DNA testing reliable enough for evidence in court cases?
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.
What factors that can affect a person appearance?
Genetic factors(DNA)
How long does DNA last in hair and what factors can affect its preservation?
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.
Why footprint is not conclusive evidence?
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.
How long can DNA forensic evidence last in clothes?
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.
What are the arguments for and against DNA evidence?
There are many arguments for and against DNA evidence. One argument is that it cannot be disproved as deciding evidence.
Factors that affect the rate of DNA migration in Agarose gels electrophoresis.?
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.
What three factors affect the organisms trait?
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).
What factors is most likely caused a mutation in DNA?
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.
Which of the following is not a type of latent evidence?
dna
Is sasquatch fake?
DNA evidence says they are not.
What is the biochemical evidence that supports evolution?
DNA
Why was it difficult to use DNA as evidence in a crime pcr was invented?
you need many copies of DNA for DNA fingerprinting
