|
Author |
Message |
|
TAGS:
|
|
|
Manager
Joined: 10 Nov 2010
Posts: 169
Followers: 4
Kudos [?]:
24
[0], given: 6
|
If one of the effects of a genetic mutation makes a [#permalink]
 10 Mar 2011, 11:05
Question Stats:
30% (02:54) correct
69% (02:12) wrong based on 8 sessions
If one of the effects of a genetic mutation makes a substantial contribution to the survival of the species, then, and only then, will that mutation be favored in natural selection. This process is subject to one proviso, namely that the traits that were not favored, yet were carried along by a trait that was favored, must not be so negative as to annul the benefits of having the new, favored trait. If the statements above are true, each of the following could be true EXCEPT: (A) A species possesses a trait whose effects are all neutral for the survival of that species. (B) All the effects of some genetic mutations contribute substantially to the survival of a species. (C) A species possesses a trait that reduces the species’ survival potential. (D) A genetic mutation that carries along several negative traits is favored in natural selection. (E) A genetic mutation whose effects are all neutral to a species is favored in natural selection.
|
|
|
|
|
|
|
Director
Status: Admitted
Affiliations: Chicago Booth
Joined: 03 Feb 2011
Posts: 947
Followers: 10
Kudos [?]:
143
[0], given: 123
|
I think this arg means - the genetic mutation is favored if the cumulative benefit of the effect is positive. Only D and E left. It cannot be D since the cumulative benefit will be negative. Hence E. vjsharma25 wrote: If one of the effects of a genetic mutation makes a
substantial contribution to the survival of the species,
then, and only then, will that mutation be favored in
natural selection. This process is subject to one proviso,
namely that the traits that were not favored, yet were
carried along by a trait that was favored, must not be
so negative as to annul the benefits of having the new,
favored trait.
If the statements above are true, each of the following
could be true EXCEPT:
(A) A species possesses a trait whose effects are all
neutral for the survival of that species.
(B) All the effects of some genetic mutations
contribute substantially to the survival of a
species.
(C) A species possesses a trait that reduces the
species’ survival potential.
(D) A genetic mutation that carries along several
negative traits is favored in natural selection.
(E) A genetic mutation whose effects are all neutral
to a species is favored in natural selection.
|
|
|
|
|
|
SVP
Status: 2000 posts! I don't know whether I should feel great or sad about it! LOL
Joined: 04 Oct 2009
Posts: 1756
Location: Peru
Schools: Harvard, Stanford, Wharton, MIT & HKS (Government)
WE 1: Economic research
WE 2: Banking
WE 3: Government: Foreign Trade and SMEs
Followers: 50
Kudos [?]:
145
[0], given: 108
|
+1 E Tricky language. Notice that there is an important difference between this LSAT question and a GMAT question. This is a COULD be true question, while a GMAT question is usually a MUST be true question. A big difference.
_________________
"Life’s battle doesn’t always go to stronger or faster men; but sooner or later the man who wins is the one who thinks he can."
My Integrated Reasoning Logbook / Diary: my-ir-logbook-diary-133264.html
Find out what's new at GMAT Club - latest features and updates
|
|
|
|
|
|
Verbal GMAT Forum Moderator
Joined: 31 Jan 2010
Posts: 500
WE 1: 4 years Tech
Followers: 7
Kudos [?]:
67
[0], given: 149
|
How can A be true ?
_________________
My Post Invites Discussions not answers
Try to give back something to the Forum.I want your explanations, right now !
Please let me know your opinion about the Chandigarh Gmat Centrehttp://gmatclub.com/forum/gmat-experience-at-chandigarh-india-centre-111830.html
|
|
|
|
|
|
Manager
Joined: 15 Jan 2011
Posts: 64
Followers: 1
Kudos [?]:
15
[0], given: 20
|
have the same doubt but as pointed out by metallicafan it is a 'could be true' q, tricky one. any idea we get such questiosn on GMAT? mundasingh123 wrote: How can A be true ?
_________________
The only place where success comes before work is in the dictionary.
If my post made you think, KUDO it. Its easy :D
|
|
|
|
|
|
Director
Status: Admitted
Affiliations: Chicago Booth
Joined: 03 Feb 2011
Posts: 947
Followers: 10
Kudos [?]:
143
[1] , given: 123
|
1
This post received
KUDOS
A has zero contradictions because of the word "possesses" a trait. Its untouched since the arg is based on "genetic mutations".
(A) A species possesses a trait whose effects are all
neutral for the survival of that species.
|
|
|
|
|
|
SVP
Status: 2000 posts! I don't know whether I should feel great or sad about it! LOL
Joined: 04 Oct 2009
Posts: 1756
Location: Peru
Schools: Harvard, Stanford, Wharton, MIT & HKS (Government)
WE 1: Economic research
WE 2: Banking
WE 3: Government: Foreign Trade and SMEs
Followers: 50
Kudos [?]:
145
[1] , given: 108
|
1
This post received
KUDOS
rohu27 wrote: have the same doubt but as pointed out by metallicafan it is a 'could be true' q, tricky one. any idea we get such questiosn on GMAT? mundasingh123 wrote: How can A be true ? Hey, I think I deserve a kudos! 
_________________
"Life’s battle doesn’t always go to stronger or faster men; but sooner or later the man who wins is the one who thinks he can."
My Integrated Reasoning Logbook / Diary: my-ir-logbook-diary-133264.html
Find out what's new at GMAT Club - latest features and updates
|
|
|
|
|
|
Director
Joined: 21 Dec 2010
Posts: 657
Followers: 9
Kudos [?]:
58
[0], given: 51
|
E is pretty obvious here.
_________________
What is of supreme importance in war is to attack the enemy's strategy.
|
|
|
|
|
|
VP
Status: There is always something new !!
Affiliations: PMI,QAI Global,eXampleCG
Joined: 08 May 2009
Posts: 1400
Followers: 8
Kudos [?]:
84
[0], given: 10
|
between D and E, D also can be possible since the negative effect may not be so much as to annul the positive effect of a mutation. E
_________________
Visit -- http://www.sustainable-sphere.com/
Promote Green Business,Sustainable Living and Green Earth !!
|
|
|
|
|
|
Manager
Joined: 14 Apr 2011
Posts: 203
Followers: 2
Kudos [?]:
16
[0], given: 19
|
I could not understand how D can be true? can someone explain?
_________________
Looking for Kudos 
|
|
|
|
|
|
Manager
Joined: 27 Dec 2007
Posts: 76
Followers: 0
Kudos [?]:
7
[0], given: 1
|
same question . How D is true?
|
|
|
|
|
|
Intern
Joined: 02 Aug 2012
Posts: 27
GMAT 1: 700 Q49 V36
Followers: 0
Kudos [?]:
1
[0], given: 2
|
Re: If one of the effects of a genetic mutation makes a [#permalink]
01 Sep 2012, 04:24
D is true in case that this same genetic mutation has also positive traits that overwhelm all the negative traits it carries.
E it is.
|
|
|
|
|
|
Manager
Joined: 27 May 2010
Posts: 205
Followers: 2
Kudos [?]:
7
[0], given: 3
|
Re: If one of the effects of a genetic mutation makes a [#permalink]
01 Sep 2012, 21:03
If one of the effects of a genetic mutation makes a substantial contribution to the survival of the species, then, and only then, will that mutation be favored in natural selection.
contradicts E: A genetic mutation whose effects are all neutral to a species is favored in natural selection.
Therefore E for me.
Please post more LSAT questions.
|
|
|
|
|
|
Manager
Joined: 29 Jul 2012
Posts: 188
GMAT Date: 11-18-2012
Followers: 0
Kudos [?]:
12
[0], given: 23
|
Re: If one of the effects of a genetic mutation makes a [#permalink]
01 Sep 2012, 23:01
'D' is wrong because 'traits must not be so negative as to annul the benefits of having the new,favored trait" "A genetic mutation that carries along several negative traits is favored in natural selection." In option 'B' negative traits are favored in natural selection but they should not be so negative
_________________
Thriving for CHANGE
|
|
|
|
|
|
Manager
Joined: 02 Jan 2011
Posts: 201
Followers: 1
Kudos [?]:
20
[0], given: 22
|
Re: If one of the effects of a genetic mutation makes a [#permalink]
02 Sep 2012, 23:30
After a long thought over the options, Chose E.
Very tricky question.
|
|
|
|
|
|
Intern
Joined: 10 Dec 2011
Posts: 32
Location: India
Concentration: Finance, Economics
GMAT Date: 09-28-2012
WE: Accounting (Manufacturing)
Followers: 0
Kudos [?]:
5
[0], given: 3
|
Re: If one of the effects of a genetic mutation makes a [#permalink]
20 Sep 2012, 16:33
I am writing my comprehension. Kindly correct me if I am wrong. According to the question, the scientists are working on some GM, which should have a positive bearing (that is, which should contribute substantially to) on the survival of certain species. Then, the scientists will catch one of those species and add GM, so that any further populations have that GM naturally. And further, the negative traits shall not worsen the positive effect, the other trait in the GM carries. Is my comprehension correct? Now, let us see the options:- A. I do not get this. How is this related to the argument in any manner? Because we do not know what trait a species carries. We only know about the trait that we are adding through GM. - ???? - So, because we cannot say anything, this may or may not be true. B. All the effects can contribute substantially. A possibility that all the traits are positive. Can happen. So, cross out. C. Now again, a species posses.... how do we know what trait a species possesses. --- ??? So, because we cannot say anything, this may or may not be true. D. That carries along several negative traits, Ok. such that one trait is so positive to annul the effects of all the negative traits. Hence cross out E. neutral - cannot happen because the effect of GM should be substantial - that is it has to be positive. Neither negative nor neutral. Hence this cannot happen certainly. - This is the correct answer. Kindly let me know about my reasoning.!!! 
|
|
|
|
|
|
Manager
Joined: 21 Jan 2010
Posts: 185
Followers: 0
Kudos [?]:
21
[0], given: 9
|
Re: If one of the effects of a genetic mutation makes a [#permalink]
27 Sep 2012, 18:23
Took me more than 2 min , i was confused between A and E because of the confusing language. However then i read closely and E is clear in opposition of what is stated in the 1st two lines.
|
|
|
|
|
|
Senior Manager
Joined: 24 Mar 2010
Posts: 347
Followers: 7
Kudos [?]:
41
[0], given: 4
|
Re: If one of the effects of a genetic mutation makes a [#permalink]
27 Sep 2012, 20:22
vjsharma25 wrote: If one of the effects of a genetic mutation makes a
substantial contribution to the survival of the species,
then, and only then, will that mutation be favored in
natural selection. This process is subject to one proviso,
namely that the traits that were not favored, yet were
carried along by a trait that was favored, must not be
so negative as to annul the benefits of having the new,
favored trait.
If the statements above are true, each of the following
could be true EXCEPT:
(A) A species possesses a trait whose effects are all
neutral for the survival of that species.
(B) All the effects of some genetic mutations
contribute substantially to the survival of a
species.
(C) A species possesses a trait that reduces the
species’ survival potential.
(D) A genetic mutation that carries along several
negative traits is favored in natural selection.
(E) A genetic mutation whose effects are all neutral
to a species is favored in natural selection. Interesting question. Took me just under 2 minutes since it's a could be question, so I had to entertain all possible scenarios. A: Nowhere does it say that a species cannot possess a trait whose effects are all neutral. The argument deals with mutations being favored in natural selection, not traits per se. B: Sort of tricky. While a negative trait can be carried along as part of a mutation if it's not detrimental to the species' survival, it is certainly possible that there exists mutations whose effects are entirely positive. C: Yes, a species can definitely possess a negative trait. However it will not be favored in natural selection as part of a mutation, but the stimulus does not rule out the possibility of a species possessing such a trait. D: As long as the negative trait is not detrimental, it can be favored during natural selection as part of a mutation. E: Correct answer. The first sentence explicitly states that one of the effets of a mutation has to contribute substantially to the survival of a species in order for it to be favored in natural selection. Thus, if its effects are all neutral, it cannot be favored.
|
|
|
|
|
|
Manager
Joined: 26 Oct 2008
Posts: 119
Followers: 4
Kudos [?]:
50
[0], given: 0
|
Re: If one of the effects of a genetic mutation makes a [#permalink]
28 Dec 2012, 00:10
Some LSAT questions are very similar to GMAT questions - but not this one. This one is almost pure formal logic. Your chances of seeing "if and only if" (here, "then and only then") in a GMAT question are extremely slim. If you really want to analyze this question (which I do NOT recommend if the GMAT is your goal), the key points are: (1) "A if and only if B" means BOTH "If A is true, then B is true" AND "If B is true, then A is true"; and (2) "Could be true EXCEPT" means that the right answer MUST be false if the paragraph is true, while any answer which MUST be true or CAN be true is WRONG. Applying point (1) to the paragraph tells us that if a mutation is favoured, then it must contribute substantially to survival. If this is true, then E has to be false; it says that a certain mutation was favoured which did NOT contribute to survival.
_________________
Grumpy
Kaplan Canada LSAT/GMAT/GRE teacher and tutor
|
|
|
|
|
|
Senior Manager
Joined: 13 Aug 2012
Posts: 468
Followers: 12
Kudos [?]:
75
[1] , given: 11
|
Re: If one of the effects of a genetic mutation makes a [#permalink]
07 Jan 2013, 02:50
1
This post received
KUDOS
vjsharma25 wrote: If one of the effects of a genetic mutation makes a
substantial contribution to the survival of the species,
then, and only then, will that mutation be favored in
natural selection. This process is subject to one proviso,
namely that the traits that were not favored, yet were
carried along by a trait that was favored, must not be
so negative as to annul the benefits of having the new,
favored trait.
If the statements above are true, each of the following
could be true EXCEPT:
(A) A species possesses a trait whose effects are all
neutral for the survival of that species.
(B) All the effects of some genetic mutations
contribute substantially to the survival of a
species.
(C) A species possesses a trait that reduces the
species’ survival potential.
(D) A genetic mutation that carries along several
negative traits is favored in natural selection.
(E) A genetic mutation whose effects are all neutral
to a species is favored in natural selection. A - could happen since the stimulus states nothing about having no such trait... B - could happen... C - could be true.... Some negative to annul the positive was mentioned. D - could happen as long as it doesn't annul the benefits.. Or it is to so negative... E - False. The stimulus states that the trait favored is the one with subs. effect...
|
|
|
|
|
|
|
Re: If one of the effects of a genetic mutation makes a
[#permalink]
07 Jan 2013, 02:50
|
|
|
|
|
|
|
|
|
|
Moderators:
metallicafan, rajeevrks27, souvik101990, PTK, MacFauz, noboru, kissthegmat, carcass, willigetmylifeback, mikemcgarry, doe007, Vercules, Legendaddy, tuanquang269, RaviChandra, Marcab, Narenn
|
close
