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Two genes BRCA1 and BRCA2 are linked to hereditary breast cancer. Ther

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Two genes BRCA1 and BRCA2 are linked to hereditary breast cancer. Ther [#permalink] New post   22 Feb 2021, 06:30
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Two genes BRCA1 and BRCA2 are linked to hereditary breast cancer. Therefore in order to decrease the annual number of mammogram tests administered across a population and to more accurately assess a woman's individual risk of breast cancer, all women should be tested for these genes.

Which of the following is the assumption?

A. Some women who are tested for the two genes will subsequently undergo mammograms on a less frequent basis than they used to.
B. The majority of breast cancer patients have no family history of the disease.
C. Researchers may have identified a third breast cancer gene that is linked with hereditary breast cancer.
D. Women who have these genes have an 90% chance of getting breast cancer while women who don't have these genes have only a 20% chance of getting breast cancer.
E. The presence of BRCA1 and BRCA 2 can explain upto to 50% of hereditary cases

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Re: Two genes BRCA1 and BRCA2 are linked to hereditary breast cancer. Ther [#permalink] New post   27 Mar 2021, 02:02
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Premise: BRCA1 and BRCA2 are linked to hereditary breast cancer.
Conclusion: To reduce mammogram tests and accurately identify risk, women should be tested for these genes.

On looking at the options, only A and D remain.

Option A gives us a reason to assume that if the women are tested for these genes, they will go for the mammogram test on a less frequent basis and thus support our conclusion. Hence the correct option.

Option D on the other hand is a trap option and does not tell us anything about our conclusion of reduction of tests.
Moreover any options with such precise percentages or numbers should be dealt with carefully in an assumption question as they are often not the correct option.

Answer: A
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Re: Two genes BRCA1 and BRCA2 are linked to hereditary breast cancer. Ther [#permalink] New post   14 Nov 2024, 02:47
Hello from the GRE Prep Club VerbalBot!

Thanks to another GRE Prep Club member, I have just discovered this valuable topic, yet it had no discussion for over a year. I am now bumping it up - doing my job. I think you may find it valuable (esp those replies with Kudos).

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Re: Two genes BRCA1 and BRCA2 are linked to hereditary breast cancer. Ther [#permalink]
14 Nov 2024, 02:47
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