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DNA fingerprinting is a recently-introduced biochemical

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Director
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DNA fingerprinting is a recently-introduced biochemical [#permalink] New post 30 Nov 2007, 11:26
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A
B
C
D
E

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“DNA fingerprinting” is a recently-introduced biochemical procedure that uses a pattern derived from a person’s genetic material to match a suspect’s genetic material against that of a specimen from a crime scene. Proponents have claimed astronomically high odds against obtaining a match by chance alone. These odds are based on an assumption that there is independence between the different characteristics represented by a single pattern.

Which one of the following, if true, casts the most doubt on the claim of the proponents of DNA fingerprinting?

(A) The large amount of genetic material that people share with all other people and with other animals is not included in the DNA fingerprinting procedure.
(B) There is generally accepted theoretical basis for interpreting the patterns produced by the procedure.
(C) In the whole population there are various different subgroups, within each of which certain sets of genetic characteristics are shared.
(D) The skill required of laboratory technicians performing the DNA fingerprinting procedure is not extraordinary.
(E) In the investigation of certain genetic diseases, the techniques used in DNA fingerprinting have traced the transmission of the diseases among the living members of very large families.

Please explain your answers.
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 [#permalink] New post 30 Nov 2007, 11:47
I will go with C. Seems to me that it weakens the claim the most. I believe it is saying that since many DNA characteristics are shared, it would make it harder to find a match.
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Re: CR: Finger printing [#permalink] New post 30 Nov 2007, 12:35
eyunni wrote:
“DNA fingerprinting” is a recently-introduced biochemical procedure that uses a pattern derived from a person’s genetic material to match a suspect’s genetic material against that of a specimen from a crime scene. Proponents have claimed astronomically high odds against obtaining a match by chance alone. These odds are based on an assumption that there is independence between the different characteristics represented by a single pattern.

Which one of the following, if true, casts the most doubt on the claim of the proponents of DNA fingerprinting?

(A) The large amount of genetic material that people share with all other people and with other animals is not included in the DNA fingerprinting procedure.
(B) There is generally accepted theoretical basis for interpreting the patterns produced by the procedure.
(C) In the whole population there are various different subgroups, within each of which certain sets of genetic characteristics are shared.
(D) The skill required of laboratory technicians performing the DNA fingerprinting procedure is not extraordinary.
(E) In the investigation of certain genetic diseases, the techniques used in DNA fingerprinting have traced the transmission of the diseases among the living members of very large families.

Please explain your answers.


The passage is really tough to disect. Fortunetly the answer choices are not so difficult (so I think =) )

A: this seems to strengthen the argument
B: Irrelevant
D: irrelevant
E: i believe this is irrelevant as well.
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 [#permalink] New post 30 Nov 2007, 13:35
I was between (A) and (C).

I completely misinterpreted the option (A). I thought that some DNA information is not considered for pattern matching and thus the possibility of match is reduced. I assumed that genetic material is unique to a person and did not realize that humans could share some common genetic material. Now I see that there is only one option.

OA is C.
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 [#permalink] New post 01 Dec 2007, 00:08
Hi,
i also think that it is between A and C and even think that A is better.
In C we know that there are subgroups but these subgroups may be a huge number and thus the claim of the proponents may hold true.
In A if the genetic material is shared then the probability of mistake is big and their claim would not hold true
  [#permalink] 01 Dec 2007, 00:08
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