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Scientists have discovered a gene that controls whether an individual

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Scientists have discovered a gene that controls whether an individual  [#permalink]

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New post 15 Feb 2019, 04:06
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Scientists have discovered a gene that controls whether an individual is monogamous. They took a gene from the monogamous prairie vole and implanted it into its more promiscuous relative, the meadow vole. Thereafter, the meadow voles with the new gene became monogamous.

Which one of the following, if true, would provide the most support for the argument’s conclusion?


(A) Studies on humans and other mammals have shown that receptors for the hormone vasopressin play a role in autism, drug addiction, and the formation of romantic attachments.

(B) Prairie voles typically form lifelong partnerships, which scientists have linked to an increased number of receptors for the hormone vasopressin.

(C) Meadow voles live in a harsher environment than prairie voles and cannot afford to pass up opportunities to mate as often as possible.

(D) The scientists used a harmless virus to capture the gene and transfer it into the meadow voles.

(E) The meadow voles that had the prairie vole gene implanted in them were released into and observed in the same habitat in which they had previously lived.

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Re: Scientists have discovered a gene that controls whether an individual  [#permalink]

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New post 27 Feb 2019, 03:45
Bunuel wrote:
Scientists have discovered a gene that controls whether an individual is monogamous. They took a gene from the monogamous prairie vole and implanted it into its more promiscuous relative, the meadow vole. Thereafter, the meadow voles with the new gene became monogamous.

Which one of the following, if true, would provide the most support for the argument’s conclusion?


(A) Studies on humans and other mammals have shown that receptors for the hormone vasopressin play a role in autism, drug addiction, and the formation of romantic attachments.

(B) Prairie voles typically form lifelong partnerships, which scientists have linked to an increased number of receptors for the hormone vasopressin.

(C) Meadow voles live in a harsher environment than prairie voles and cannot afford to pass up opportunities to mate as often as possible.

(D) The scientists used a harmless virus to capture the gene and transfer it into the meadow voles.

(E) The meadow voles that had the prairie vole gene implanted in them were released into and observed in the same habitat in which they had previously lived.


OFFICIAL EXPLANATION:



E. The meadow voles that had the prairie vole gene implanted in them were released into and observed in the same habitat in which they had previously lived.

Look for information that supports the assumption that the meadow voles’ change in behavior was caused by the implanted gene. Choice (A) is wrong. The choice doesn’t relate the effects of the hormone to the gene that makes meadow voles monogamous. Choice (B) explains what’s up with prairie voles but not with meadow voles, and neither’s genes are mentioned. Choice (C) explains why meadow voles are typically promiscuous but says nothing about whether a gene plays a part in that. Choice (D) says nothing about whether the transferred gene is the cause of the monogamous behavior. Choice (E) provides the most support for the assertion that the scientists’ work with genes was the factor that turned the formerly promiscuous meadow voles into models of monogamy because it rules out a possible other important factor that may have explained the change (different surroundings). Choice (E) is the correct answer.
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Collection of Questions:
PS: 1. Tough and Tricky questions; 2. Hard questions; 3. Hard questions part 2; 4. Standard deviation; 5. Tough Problem Solving Questions With Solutions; 6. Probability and Combinations Questions With Solutions; 7 Tough and tricky exponents and roots questions; 8 12 Easy Pieces (or not?); 9 Bakers' Dozen; 10 Algebra set. ,11 Mixed Questions, 12 Fresh Meat

DS: 1. DS tough questions; 2. DS tough questions part 2; 3. DS tough questions part 3; 4. DS Standard deviation; 5. Inequalities; 6. 700+ GMAT Data Sufficiency Questions With Explanations; 7 Tough and tricky exponents and roots questions; 8 The Discreet Charm of the DS; 9 Devil's Dozen!!!; 10 Number Properties set., 11 New DS set.


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Re: Scientists have discovered a gene that controls whether an individual   [#permalink] 27 Feb 2019, 03:45
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