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It is proposed to introduce mosquitoes into the wild with genetic

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It is proposed to introduce mosquitoes into the wild with genetic [#permalink]

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New post 19 Feb 2016, 12:43
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It is proposed to introduce mosquitoes into the wild with genetic alterations that destroy their disease-carrying capacity. In this way, the dangerous wild population could eventually be replaced with a harmless one without leaving room for another disease-transmitting type to flourish. One candidate gene would interfere with the mosquito’s finding mates; another would cause destruction of a disease parasite before the stage at which it could be transmitted; another would disable the mosquito’s own resistance to disease, so that it would die before transmitting the disease.

Which of the following identifies a discrepancy in the proposal above?

A. It is presupposed that the three genes would prove equally easy to isolate and insert into the cells of the mosquitoes.
B. Two of the ways of destroying disease carrying capacity in the wild would jeopardize the goal of the proposal.
C. It does not take into account positive roles that mosquitoes play in the environment, such as serving, in the larval stage, as food for fish.
D. None of the proposed alternatives would ensure that there would be fewer mosquitoes in any given area.
E. Evidence is not presented to show that each alternative method has been successfully tested on a wide scale.
[Reveal] Spoiler: OA

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It is proposed to introduce mosquitoes into the wild with genetic [#permalink]

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New post 19 Feb 2016, 20:33
"another would cause destruction of a disease parasite before the stage at which it could be transmitted; another would disable the mosquito’s own resistance to disease, so that it would die before transmitting the disease."

These two ways are contradicting each other.

So, it should be B.
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Re: It is proposed to introduce mosquitoes into the wild with genetic [#permalink]

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New post 20 Feb 2016, 00:20
Nevernevergiveup wrote:
It is proposed to introduce mosquitoes into the wild with genetic alterations that destroy their disease-carrying capacity. In this way, the dangerous wild population could eventually be replaced with a harmless one without leaving room for another disease-transmitting type to flourish. One candidate gene would interfere with the mosquito’s finding mates; another would cause destruction of a disease parasite before the stage at which it could be transmitted; another would disable the mosquito’s own resistance to disease, so that it would die before transmitting the disease.

Which of the following identifies a discrepancy in the proposal above?

A. It is presupposed that the three genes would prove equally easy to isolate and insert into the cells of the mosquitoes.
B. Two of the ways of destroying disease carrying capacity in the wild would jeopardize the goal of the proposal.
C. It does not take into account positive roles that mosquitoes play in the environment, such as serving, in the larval stage, as food for fish.
D. None of the proposed alternatives would ensure that there would be fewer mosquitoes in any given area.
E. Evidence is not presented to show that each alternative method has been successfully tested on a wide scale.



Objective here is to replace harmful mosquitoes will harmless ones.

option A - Out of Scope
Option B- Yes. The two options contradict the main objective.
Option C- Out of Scope
Option D- Fewer mosquitoes . Not relevant with the objective.
Option E- Out of Scope.

Answer: B
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Re: It is proposed to introduce mosquitoes into the wild with genetic [#permalink]

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New post 03 Apr 2018, 20:18
[quote="Nevernevergiveup"]It is proposed to introduce mosquitoes into the wild with genetic alterations that destroy their disease-carrying capacity. In this way, the dangerous wild population could eventually be replaced with a harmless one without leaving room for another disease-transmitting type to flourish. One candidate gene would interfere with the mosquito’s finding mates; another would cause destruction of a disease parasite before the stage at which it could be transmitted; another would disable the mosquito’s own resistance to disease, so that it would die before transmitting the disease.

Which of the following identifies a discrepancy in the proposal above?

A. It is presupposed that the three genes would prove equally easy to isolate and insert into the cells of the mosquitoes.
B. Two of the ways of destroying disease carrying capacity in the wild would jeopardize the goal of the proposal.
C. It does not take into account positive roles that mosquitoes play in the environment, such as serving, in the larval stage, as food for fish.
D. None of the proposed alternatives would ensure that there would be fewer mosquitoes in any given area.
E. Evidence is not presented to show that each alternative method has been successfully tested on a wide scale.[/quote]

I didn’t understand option B completely, it says two of the options however only one of the candidate gene is killing the carrier( the third one ) where as the other two seems benine to the mosquito

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Re: It is proposed to introduce mosquitoes into the wild with genetic [#permalink]

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New post 10 Apr 2018, 19:49
I’m a bit confused on this one. How is B correct?

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It is proposed to introduce mosquitoes into the wild with genetic [#permalink]

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New post 10 Apr 2018, 20:13
One candidate gene would interfere with the mosquito’s finding mates; another would cause destruction of a disease parasite before the stage at which it could be transmitted; another would disable the mosquito’s own resistance to disease, so that it would die before transmitting the disease.

Which of the following identifies a discrepancy in the proposal above


If the mosquito is unable to find a date that means the gene in the mosquito will not pass on to the general population.hence defeats the purpose since the harmful population of mosquitoes won't be replaced. For second discrepancy assume that it is in the final adult stage that the disease develops in the mosquito now either the mosquito dies or the parasite . Again no change in the existing harmful population


Hence B

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Re: It is proposed to introduce mosquitoes into the wild with genetic [#permalink]

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New post 10 Apr 2018, 20:36
mini246 wrote:
One candidate gene would interfere with the mosquito’s finding mates; another would cause destruction of a disease parasite before the stage at which it could be transmitted; another would disable the mosquito’s own resistance to disease, so that it would die before transmitting the disease.

Which of the following identifies a discrepancy in the proposal above


If the mosquito is unable to find a date that means the gene in the mosquito will not pass on to the general population.hence defeats the purpose since the harmful population of mosquitoes won't be replaced. For second discrepancy assume that it is in the final adult stage that the disease develops in the mosquito now either the mosquito dies or the parasite . Again no change in the existing harmful population


Hence B

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Re: It is proposed to introduce mosquitoes into the wild with genetic [#permalink]

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New post 22 Apr 2018, 19:41
RockPaperScissors wrote:
Nevernevergiveup wrote:
It is proposed to introduce mosquitoes into the wild with genetic alterations that destroy their disease-carrying capacity. In this way, the dangerous wild population could eventually be replaced with a harmless one without leaving room for another disease-transmitting type to flourish. One candidate gene would interfere with the mosquito’s finding mates; another would cause destruction of a disease parasite before the stage at which it could be transmitted; another would disable the mosquito’s own resistance to disease, so that it would die before transmitting the disease.

Which of the following identifies a discrepancy in the proposal above?

A. It is presupposed that the three genes would prove equally easy to isolate and insert into the cells of the mosquitoes.
B. Two of the ways of destroying disease carrying capacity in the wild would jeopardize the goal of the proposal.
C. It does not take into account positive roles that mosquitoes play in the environment, such as serving, in the larval stage, as food for fish.
D. None of the proposed alternatives would ensure that there would be fewer mosquitoes in any given area.
E. Evidence is not presented to show that each alternative method has been successfully tested on a wide scale.


I didn’t understand option B completely, it says two of the options however only one of the candidate gene is killing the carrier( the third one ) where as the other two seems benine to the mosquito

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Re: It is proposed to introduce mosquitoes into the wild with genetic [#permalink]

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New post 22 Apr 2018, 23:45
Nevernevergiveup wrote:
It is proposed to introduce mosquitoes into the wild with genetic alterations that destroy their disease-carrying capacity. In this way, the dangerous wild population could eventually be replaced with a harmless one without leaving room for another disease-transmitting type to flourish. One candidate gene would interfere with the mosquito’s finding mates; another would cause destruction of a disease parasite before the stage at which it could be transmitted; another would disable the mosquito’s own resistance to disease, so that it would die before transmitting the disease.


Which of the following identifies a discrepancy in the proposal above?

A. It is presupposed that the three genes would prove equally easy to isolate and insert into the cells of the mosquitoes.

B. Two of the ways of destroying disease carrying capacity in the wild would jeopardize the goal of the proposal.

C. It does not take into account positive roles that mosquitoes play in the environment, such as serving, in the larval stage, as food for fish.

D. None of the proposed alternatives would ensure that there would be fewer mosquitoes in any given area.

E. Evidence is not presented to show that each alternative method has been successfully tested on a wide scale.


A. Ease or difficulty to isolate or insert is not the concern. Even if the plan is successful with difficulties then it is good.

B. It shows the clear reason that if two ways would jeopardize the plan then plan is almost fails. Plan is to introduce harmless

mosquitoes, but as the premise says "another would disable the mosquito’s own resistance to disease, so that it would die before

transmitting the disease"
, this will jeopardize the proposal.

C, D, and E are Irrelevant to the discrepancy.

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Re: It is proposed to introduce mosquitoes into the wild with genetic   [#permalink] 22 Apr 2018, 23:45
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