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# If a geneticist selects any arbitrary group of people for

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If a geneticist selects any arbitrary group of people for [#permalink]

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20 Oct 2012, 08:37
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If a geneticist selects any arbitrary group of people—for instance, those who enjoy watching football games—and examines them closely enough, he or she may well find a genetic marker common to all of them. But that shared marker need not have anything to do with the fact that they all like football.

The consideration above can best serve as part of an argument against the view that

1]An individual's personality is more likely to be determined by the environment in which he grew up than by his or her genetic makeup.
2]The discovery that alcoholics share a common gene establishes that alcoholism is genetically determined.
3]Certain personality traits are determined neither by environment nor by heredity, but by some unknown third element.
4]Since genetic makeup may determine how one responds to one's environment, scientists cannot assume that heredity plays no role in personality development.
5]Certain personality traits can be reinforced by spending time with others who share that personality trait.
[Reveal] Spoiler: OA

Last edited by dentobizz on 30 Oct 2013, 12:56, edited 3 times in total.
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Re: If a geneticist selects any arbitrary group of people.... [#permalink]

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20 Oct 2012, 10:32
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Jp27 wrote:
If a geneticist selects any arbitrary group of people—for instance, those who enjoy watching football games—and examines them closely enough, he or she may well find a genetic marker common to all of them. But that shared marker need not have anything to do with the fact that they all like football.

The consideration above can best serve as part of an argument against the view that

1/An individual's personality is more likely to be determined by the environment in which he grew up than by his or her genetic makeup.
2/The discovery that alcoholics share a common gene establishes that alcoholism is genetically determined.
3/Certain personality traits are determined neither by environment nor by heredity, but by some unknown third element.
4/Since genetic makeup may determine how one responds to one's environment, scientists cannot assume that heredity plays no role in personality development.
5/Certain personality traits can be reinforced by spending time with others who share that personality trait.

OA after some discussion.

the argument basically supports the conclusion that hereditary is not responsible for the people's interest in football...and the question asks us which of the options are weakening the assumption.

thus, we need to proove that hereditary is one of the factors responsible for it.

now options

1/An individual's personality is more likely to be determined by the environment in which he grew up than by his or her genetic makeup. ---where are we talking about environment in the whole passage? this strengthens the conclusion.
2/The discovery that alcoholics share a common gene establishes that alcoholism is genetically determined.---may be...keep it intact.
3/Certain personality traits are determined neither by environment nor by heredity, but by some unknown third element.--- shows that there are other things than hereditary which are responsible for the common interests.but doesnt prves that hereditary is responsible.--chuck it out.
4/Since genetic makeup may determine how one responds to one's environment, scientists cannot assume that heredity plays no role in personality development. --- strenghthens it--out
5/Certain personality traits can be reinforced by spending time with others who share that personality trait. --- environment is responsible..so chuck it..!!

IMO B...wats the OA?
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Re: If a geneticist selects any arbitrary group of people.... [#permalink]

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20 Oct 2012, 12:54
Jp27 wrote:
If a geneticist selects any arbitrary group of people—for instance, those who enjoy watching football games—and examines them closely enough, he or she may well find a genetic marker common to all of them. But that shared marker need not have anything to do with the fact that they all like football.

The consideration above can best serve as part of an argument against the view that

1/An individual's personality is more likely to be determined by the environment in which he grew up than by his or her genetic makeup.
2/The discovery that alcoholics share a common gene establishes that alcoholism is genetically determined.
3/Certain personality traits are determined neither by environment nor by heredity, but by some unknown third element.
4/Since genetic makeup may determine how one responds to one's environment, scientists cannot assume that heredity plays no role in personality development.
5/Certain personality traits can be reinforced by spending time with others who share that personality trait.

OA after some discussion.

Here, we're stating that the shared genetics of an arbitrary group are not an indication about the traits that they may share.
Thus, assuming the above statement to be true, we need to find an answer choice that could be weakened by it. (seems sort of reverse weaken question. )

anyways, finding links between "group of people", "shared genetics / common genes" and "common traits", IMO, the above conclusion weakens option B.
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Re: If a geneticist selects any arbitrary group of people.... [#permalink]

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20 Oct 2012, 12:55
B for me too..

Argument says Similar genes not necessarily reason for liking football.

Could be used effectively against an argument which says that people who share an activity and gene structure do so because the activity has something to do with the gene structure.
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Re: If a geneticist selects any arbitrary group of people.... [#permalink]

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21 Oct 2012, 01:00
its B..

Jp27 wrote:
If a geneticist selects any arbitrary group of people—for instance, those who enjoy watching football games—and examines them closely enough, he or she may well find a genetic marker common to all of them. But that shared marker need not have anything to do with the fact that they all like football.

The consideration above can best serve as part of an argument against the view that

1/An individual's personality is more likely to be determined by the environment in which he grew up than by his or her genetic makeup.
2/The discovery that alcoholics share a common gene establishes that alcoholism is genetically determined.
3/Certain personality traits are determined neither by environment nor by heredity, but by some unknown third element.
4/Since genetic makeup may determine how one responds to one's environment, scientists cannot assume that heredity plays no role in personality development.
5/Certain personality traits can be reinforced by spending time with others who share that personality trait.

OA
[Reveal] Spoiler:
B

this is best against option B...comon gene leads conclusion to alcoholism is genetically determined.. bt author is saying agains that..not all genetically same ppl will like football
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Re: If a geneticist selects any arbitrary group of people for [#permalink]

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30 Oct 2013, 10:24
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Re: If a geneticist selects any arbitrary group of people for [#permalink]

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19 Nov 2013, 12:40
Convinced with the answer choice B. But can someone explain why choice D is wrong? It also talks about genetic relation in personality development.
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Re: If a geneticist selects any arbitrary group of people for [#permalink]

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19 Nov 2013, 14:58
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gmathunter07 wrote:
Convinced with the answer choice B. But can someone explain why choice D is wrong? It also talks about genetic relation in personality development.

Good question. Let’s take a quick look at the potential arguments with weakening statements for both B and D.

Argument B
Genetic link found for alcoholics - therefore alcoholism is genetically caused

Weakening (from stem)
Any group can be linked genetically even though the marker may have no relevance

[Direct, strong weakening of argument]

Argument D
Genes may determine environmental responses, therefore scientists can’t say that heredity doesn’t impact personality

Weakening (from stem)
Any group can be linked genetically even though the marker may have no relevance

[Indirect, minor potential weakening]

Even though the statement from the stem does work against the Argument, the connection isn’t very strong. The potential argument is so broad and the weakening statement provides a very specific counterpoint. With the argument stating that scientists can’t rule out genetics when thinking about personality, providing a counterpoint about genetic links for football watchers would not give scientists license to ignore heredity impacts on personality.

This is a good example of what happens with CR answer choices. You will often find 2 relevant answer choices and you have to determine which one is best (the question states: The consideration above can BEST serve…).

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Re: If a geneticist selects any arbitrary group of people for [#permalink]

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26 Jul 2014, 05:26
Good question

Conclusion :-But that shared marker need not have anything to do with the fact that they all like football.

to weaken this we need to prove shared marker plays some roll in determining characteristics, B says,"The discovery that alcoholics share a common gene establishes that alcoholism is genetically determined." (weakening the conclusion)

So correct!!

Hope that helps
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Re: If a geneticist selects any arbitrary group of people for [#permalink]

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05 Aug 2016, 02:59
Hello from the GMAT Club VerbalBot!

Thanks to another GMAT 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: If a geneticist selects any arbitrary group of people for   [#permalink] 05 Aug 2016, 02:59
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