Case Closed? While Kominski's mDNA was a match to that found on the shawl, the case is not as airtight as it might seem. Mitochondrial DNA is not the same as nuclear DNA. It is passed down separately from nuclear DNA and is inherited through the maternal line. Nuclear DNA can be used to make a very clear match between a suspect and evidence but it breaks down over time and couldn't be used in this case. While mitochondrial DNA can be used to exclude suspects, it can not be used to confirm with 100% certainty the identity of a suspect. In fact,it is likely that 1 in 50 to 1 in 100 individuals in England would also have a match to the mitochondrial DNA found on the evidence. In addition to the uncertainty left by the DNA match questions have been raised about the authenticity of the shawl as well as how it was handled. There is no established chain of custody and therefore it can not be proven that the shawl belonged to Eddowes or was at a crime scene. The origin of the article of clothing relies heavily on family stories. Doubt has also been raised about when the mDNA samples were left. As Eddowes had multiple clients over a long period of time it is possible that the stain left behind was not left on the night of the murder but on previous encounter. your fhoughts. 29. What does mDNA stand for? 30. How is mDNA passed down? 31. In what ways is mDNA useful in forensics? 32. Why couldn't nuclear DNA be used in this case? 33. What is a chain of custody? Do you think there is enough evidence to link Kominski to the murders? Why or Why not? Do you think Jack the Ripper could have gotten away with the murders today?

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Case Closed? While Kominski's mDNA was a match to that found on the shawl, the case is not as airtight as it might seem. Mitochondrial DNA is not the same as nuclear DNA. It is passed down separately from nuclear DNA and is inherited through the maternal line. Nuclear DNA can be used to make a very clear match between a suspect and evidence but it breaks down over time and couldn't be used in this case. While mitochondrial DNA can be used to exclude suspects, it can not be used to confirm with 100% certainty the identity of a suspect. In fact,it is likely that 1 in 50 to 1 in 100 individuals in England would also have a match to the mitochondrial DNA found on the evidence. In addition to the uncertainty left by the DNA match questions have been raised about the authenticity of the shawl as well as how it was handled. There is no established chain of custody and therefore it can not be proven that the shawl belonged to Eddowes or was at a crime scene. The origin of the article of clothing relies heavily on family stories. Doubt has also been raised about when the mDNA samples were left. As Eddowes had multiple clients over a long period of time it is possible that the stain left behind was not left on the night of the murder but on previous encounter. your fhoughts. 29. What does mDNA stand for? 30. How is mDNA passed down? 31. In what ways is mDNA useful in forensics? 32. Why couldn't nuclear DNA be used in this case? 33. What is a chain of custody? Do you think there is enough evidence to link Kominski to the murders? Why or Why not? Do you think Jack the Ripper could have gotten away with the murders today?

Answer 1

29. mDNA stands for mitochondrial DNA. 30. mDNA is passed down through the maternal line, meaning it is inherited from the mother to her children. 31. In forensics, mDNA can be used to exclude suspects, as it can show that a person did not contribute to the mDNA found at a crime scene. However, it cannot be used to confirm with 100% certainty the identity of a suspect, as multiple individuals may share the same mDNA. 32. Nuclear DNA could not be used in this case because it breaks down over time and is not as reliable as mDNA. Additionally, the passage mentions that nuclear DNA can make a very clear match between a suspect and evidence, but in this case, the nuclear DNA was not available or could not be used. 33. A chain of custody refers to the chronological documentation or paper trail that records the sequence of custody, control, transfer, analysis, and disposition of physical or electronic evidence. It ensures that the evidence has been handled properly and maintains its integrity. As for the last question, it is subjective and depends on one's perspective. Some may argue that there is enough evidence to link Kominski to the murders based on the mDNA match, while others may argue that the lack of a chain of custody and the possibility of contamination or misidentification makes the evidence insufficient. Ultimately, it is up to the individual to form their own opinion based on the information provided.

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