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Questions tagged [forensics]

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What software is good for the Y STR data processing?

What software is good for the Y STR data processing? I have Arlequin, Structure, GeneLand and Cervus. What is a better choice for the data processing of haploid Y STR data for the estimation of a ...
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2answers
58 views

Does the DNA stick to surfaces we touch?

In case of robbery, the police visit the robbery scene and collect some samples like foot print or any item suspected to have been touched by the robber. The sample is then taken to laboratory for DNA ...
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13 views

Spectogram of mimicry vs original [closed]

Suppose the mimicry of a voice is very accurate. Will it have similar spectogram as the original voice?
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1answer
30 views

Storage DNA Condition

It is possible to store a digestion of cells with lysis buffer several days at -20 degrees and then proceed with the phenol chloroform isoamyl purification? Thanks.
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1answer
1k views

How accurate is facial reconstruction in forensics?

I’ve seen on tv where they reconstruct heads and faces from the remains of ancient people and I was wondering if anyone had a source that has pictures of maybe side by side of a facial reconstruction ...
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0answers
9 views

Acid/basic chemicals that can be used without extraction hood?

I need to use some meat dissolvent for my thesis, I’m working in forensic anthropology, but in my university, we are not allowed to use those which might be extremely harmful (such as HF or HCl due to ...
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0answers
36 views

DNA Longevity in Keratin, Ivory and other Bioplastics

For how long is DNA viable for extraction and/or sequencing in bioplastics created by the human body? I checked out a few links online, and this article gives a record of about 7000 years for frozen ...
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0answers
93 views

When did human and animal blood became distinguishable from each other as forensic evidence?

Since a few decades ago, DNA testing became an important tool in criminal forensics, and a lot of information can be gathered from a single drop of blood or from a few cells. Even before that, blood ...
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2answers
155 views

Can DNA fingerprinting tell you if someone has been genetically engineered?

I am writing a fictional novel about an extensively genetically engineered man, unbeknownst to him, who gets into trouble on a regular basis. The man is physically large and strong, very fast (tiger-...
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1answer
2k views

Can rigor mortis change the anatomical position in which a person died?

I've been told as an undergrad in anthropology that the flexed position of the body in which some Neanderthal skeletons were found indicates that they were deliberately buried. Apart from the good ...
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1answer
119 views

DNA fingerprinting

About a month ago i performed a DNA fingerprinting lab and now i have a small lab report due in about two weeks. Questions: What are some possible errors that can happen during the process of DNA ...
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1answer
178 views

Using egg whites as DNA destruction test possible? [closed]

My current theory to test for the destruction of any DNA that may be used as forensic evidence is to use an egg white. I would like to test various myths and methods for destroying DNA evidence and ...
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1answer
157 views

Why do we need to replicate incomplete DNA fragments by PCR from a crime scene?

If the DNA from a crime scene is damaged, why would it be helpful to replicate it by PCR (polymerase chain reaction)? Even if we get billions of those copies, it is still incomplete, isn't it? How ...
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206 views

Henry Fingerprint Classification System Disrepency Among Articles

I know that the formula for fingerprint primary classifications is [1+(even finger value sum)]/[1+(odd finger value sum)]. So according to this formula and the Henry Classification System finger ...
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0answers
47 views

can you tell someone's age from a DNA sample? [duplicate]

So as I understand it telomeres shorten as you age. Working under that assumption.. let's say you were investigating a crime and there was some DNA evidence that had been left behind. Could you ...
4
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1answer
110 views

Decomposition Rate of A Body In A Wet Environment [closed]

I have a photo of a decomposing dog which is in a water logged environment. My peers and I are debating how long that body has been decomposing. They are saying it is at least a year old. I however ...
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2answers
2k views

The Uniqueness of DNA Paradox

How can everyone have unique iris and fingerprints? After a certain amount of human beings have lived on earth, wouldn't it be possible to exhaust all possible combinations? The same principle ...
3
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1answer
134 views

Forensic genetics- why is mtDNA comparison sometimes better than nDNA comparison?

Why is (in forensic genetics) in some cases more appropriate comparison of nuclear DNA but in some other cases comparison of mitochondrial DNA? Is it because geneticists are sometimes unable to find ...
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0answers
343 views

Time for rigor mortis to set in [closed]

Rigor mortis sets in due to non-functional "ATP powered calcium pumps" as a result of which the calcium ions stream out & the muscles remain in a suspended animation state. But, it's a frequent ...