GENETICS AND EVOLUTION
INHERITANCE AND VARIATION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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They cannot and this is making body identification very difficult.
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Each sample provides an exact karyotype for genetic identification.
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DNA is the same in every cell of the body and does not change over time.
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The DNA must all come from the hair in order to be accurate
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Detailed explanation-1: -Hair analysis is done by collecting a hair sample and sending it to a laboratory. If a DNA test is done on the hair, then the hair collected needs to have the root attached. Hair samples are taken from a specific part of the body, such as from the back of the scalp by the neck or from the pubic area.
Detailed explanation-2: -Extracting ancient DNA from bone samples Take a small sample (0.5–1.0g) of bone. Grind this into powder. Decalcify by suspending the sample in EDTA overnight at room temperature. Centrifuge to collect the sediment.
Detailed explanation-3: -Nuclear DNA analysis can be done on human hairs. The trace section assists the DNA section by screening hairs and determining their suitability for DNA testing. A microscope is used to examine the root end of the hairs, in order to determine if they are suitable.
Detailed explanation-4: -Hair Follicle DNA Test Cheek swabs are guaranteed to contain viable DNA; however, hair strands are not. We typically can extract the DNA in 80-90% of cases. If you order this test, and the hair turns out to not have viable DNA, you will not get results.