It is currently 23 Oct 2017, 01:14

### GMAT Club Daily Prep

#### Thank you for using the timer - this advanced tool can estimate your performance and suggest more practice questions. We have subscribed you to Daily Prep Questions via email.

Customized
for You

we will pick new questions that match your level based on your Timer History

Track

every week, we’ll send you an estimated GMAT score based on your performance

Practice
Pays

we will pick new questions that match your level based on your Timer History

# Events & Promotions

###### Events & Promotions in June
Open Detailed Calendar

# If one of the effects of a genetic mutation makes a

Author Message
TAGS:

### Hide Tags

Manager
Joined: 10 Nov 2010
Posts: 158

Kudos [?]: 335 [3], given: 6

If one of the effects of a genetic mutation makes a [#permalink]

### Show Tags

10 Mar 2011, 11:05
3
KUDOS
13
This post was
BOOKMARKED
00:00

Difficulty:

95% (hard)

Question Stats:

40% (01:53) correct 60% (02:17) wrong based on 915 sessions

### HideShow timer Statistics

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.
[Reveal] Spoiler: OA

Kudos [?]: 335 [3], given: 6

Retired Moderator
Status: 2000 posts! I don't know whether I should feel great or sad about it! LOL
Joined: 04 Oct 2009
Posts: 1634

Kudos [?]: 1107 [4], given: 109

Location: Peru
Schools: Harvard, Stanford, Wharton, MIT & HKS (Government)
WE 1: Economic research
WE 2: Banking
WE 3: Government: Foreign Trade and SMEs

### Show Tags

12 Mar 2011, 14:55
4
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: http://gmatclub.com/forum/my-ir-logbook-diary-133264.html

GMAT Club Premium Membership - big benefits and savings

Kudos [?]: 1107 [4], given: 109

Verbal Forum Moderator
Joined: 31 Jan 2010
Posts: 487

Kudos [?]: 162 [1], given: 149

WE 1: 4 years Tech

### Show Tags

10 Mar 2011, 22:19
1
KUDOS
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 !

Kudos [?]: 162 [1], given: 149

Manager
Joined: 15 Jan 2011
Posts: 59

Kudos [?]: 21 [1], given: 20

### Show Tags

12 Mar 2011, 10:37
1
KUDOS
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

Kudos [?]: 21 [1], given: 20

Director
Status: Impossible is not a fact. It's an opinion. It's a dare. Impossible is nothing.
Affiliations: University of Chicago Booth School of Business
Joined: 03 Feb 2011
Posts: 871

Kudos [?]: 396 [1], given: 123

### Show Tags

12 Mar 2011, 10:47
1
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.

Kudos [?]: 396 [1], given: 123

Senior Manager
Joined: 13 Aug 2012
Posts: 458

Kudos [?]: 542 [1], given: 11

Concentration: Marketing, Finance
GPA: 3.23
Re: If one of the effects of a genetic mutation makes a [#permalink]

### Show Tags

07 Jan 2013, 02:50
1
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...
_________________

Impossible is nothing to God.

Kudos [?]: 542 [1], given: 11

Director
Status: Impossible is not a fact. It's an opinion. It's a dare. Impossible is nothing.
Affiliations: University of Chicago Booth School of Business
Joined: 03 Feb 2011
Posts: 871

Kudos [?]: 396 [0], given: 123

### Show Tags

10 Mar 2011, 11:15
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.

Kudos [?]: 396 [0], given: 123

Retired Moderator
Status: 2000 posts! I don't know whether I should feel great or sad about it! LOL
Joined: 04 Oct 2009
Posts: 1634

Kudos [?]: 1107 [0], given: 109

Location: Peru
Schools: Harvard, Stanford, Wharton, MIT & HKS (Government)
WE 1: Economic research
WE 2: Banking
WE 3: Government: Foreign Trade and SMEs

### Show Tags

10 Mar 2011, 13:58
+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: http://gmatclub.com/forum/my-ir-logbook-diary-133264.html

GMAT Club Premium Membership - big benefits and savings

Kudos [?]: 1107 [0], given: 109

Director
Joined: 21 Dec 2010
Posts: 624

Kudos [?]: 279 [0], given: 51

### Show Tags

03 May 2011, 10:54
E is pretty obvious here.
_________________

What is of supreme importance in war is to attack the enemy's strategy.

Kudos [?]: 279 [0], given: 51

VP
Status: There is always something new !!
Affiliations: PMI,QAI Global,eXampleCG
Joined: 08 May 2009
Posts: 1285

Kudos [?]: 283 [0], given: 10

### Show Tags

17 May 2011, 01:11
1
This post was
BOOKMARKED
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 !!

Kudos [?]: 283 [0], given: 10

Manager
Joined: 14 Apr 2011
Posts: 193

Kudos [?]: 27 [0], given: 19

### Show Tags

13 Jul 2011, 10:06
I could not understand how D can be true? can someone explain?
_________________

Looking for Kudos

Kudos [?]: 27 [0], given: 19

Manager
Joined: 27 Dec 2007
Posts: 74

Kudos [?]: 39 [0], given: 1

### Show Tags

14 Jul 2011, 01:30
same question . How D is true?

Kudos [?]: 39 [0], given: 1

Intern
Joined: 02 Aug 2012
Posts: 24

Kudos [?]: 2 [0], given: 2

GMAT 1: 700 Q49 V36
Re: If one of the effects of a genetic mutation makes a [#permalink]

### Show Tags

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.

Kudos [?]: 2 [0], given: 2

Manager
Joined: 27 May 2010
Posts: 197

Kudos [?]: 71 [0], given: 3

Re: If one of the effects of a genetic mutation makes a [#permalink]

### Show Tags

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.

Kudos [?]: 71 [0], given: 3

Manager
Joined: 29 Jul 2012
Posts: 185

Kudos [?]: 118 [0], given: 23

GMAT Date: 11-18-2012
Re: If one of the effects of a genetic mutation makes a [#permalink]

### Show Tags

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

Kudos [?]: 118 [0], given: 23

Manager
Joined: 02 Jan 2011
Posts: 192

Kudos [?]: 62 [0], given: 22

Re: If one of the effects of a genetic mutation makes a [#permalink]

### Show Tags

02 Sep 2012, 23:30
After a long thought over the options, Chose E.

Very tricky question.

Kudos [?]: 62 [0], given: 22

Manager
Joined: 10 Dec 2011
Posts: 71

Kudos [?]: 27 [0], given: 29

Location: India
Concentration: Finance, Economics
GMAT Date: 09-28-2012
WE: Accounting (Manufacturing)
Re: If one of the effects of a genetic mutation makes a [#permalink]

### Show Tags

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.!!!

Kudos [?]: 27 [0], given: 29

Senior Manager
Joined: 21 Jan 2010
Posts: 329

Kudos [?]: 226 [0], given: 12

Re: If one of the effects of a genetic mutation makes a [#permalink]

### Show Tags

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.

Kudos [?]: 226 [0], given: 12

Senior Manager
Joined: 24 Mar 2010
Posts: 350

Kudos [?]: 115 [0], given: 4

Re: If one of the effects of a genetic mutation makes a [#permalink]

### Show Tags

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.

Kudos [?]: 115 [0], given: 4

Manager
Joined: 26 Oct 2008
Posts: 116

Kudos [?]: 114 [0], given: 0

Re: If one of the effects of a genetic mutation makes a [#permalink]

### Show Tags

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

Kudos [?]: 114 [0], given: 0

Re: If one of the effects of a genetic mutation makes a   [#permalink] 28 Dec 2012, 00:10

Go to page    1   2    Next  [ 23 posts ]

Display posts from previous: Sort by