It is currently 19 Feb 2018, 13:49

### 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

# Some anthropologists believe that the genetic homogeneity

Author Message
TAGS:

### Hide Tags

Intern
Joined: 07 Feb 2017
Posts: 7
Re: Some anthropologists believe that the genetic homogeneity [#permalink]

### Show Tags

13 Jan 2018, 08:14
egmat wrote:
SidKaria wrote:
Some anthropologists believe that the genetic homogeneity evident in the world's people is the result of a "population bottleneck"---at some time in the past our ancestors suffered an event, greatly reducing their numbers and thus our genetic variation.

(A)at some time in the past our ancestors suffered an event, greatly reducing their numbers

(B)that at some time in the past our ancestors suffered an event that greatly reduced their numbers

(C)that some time in the past our ancestors suffered an even so that their numbers were greatly reduced,

(D)some time in the past our ancestors suffered an event from which their numbers were greatly reduced

(E)some time in the past, that our ancestors suffered an even so as to reduce their numbers greatly

i have 2 doubts in this question
1)that greatly reduced their numbers and thus our genetic variation.
how is this parallel ?? that.... numbers is an IC, clause while the 2nd part is a phrase.

2)OG says that at some time or adverb sometime is needed and some time in option c is incorrect.

can u please explain why is it so ??

Hi Sid,

This is the structure of Choice B: ...at some time in the past our ancestors suffered an event that greatly reduced
a. their numbers and
b. thus our genetic variation

The noun entities "their numbers" and "our genetic variation" are grammatically parallel to each other. Now, "thus" is an adverb, a modifier, that presents the effect of an action. It's placement before the second entity DOS NOT violate the grammatical parallelism in any way. Hence, the parallelism is all correct in Choice B.

Now, "sometime" is not the same as "some time". The former means "at some point in time" while the other means "a little time". Let's take two very simple examples here:

1. Sometimes, i visit the public library.
2. Please give me some time to finish this question.

That's the reason why "some time" is incorrect in Choice C.

Hope this helps.
Thanks.
SJ

Hi Payal ,

I am having little confusion with dash .
The example given by you .
Mariana believes that altruism exists even in today’s day and age — that people can help others without any selfish motives is not an idea that is too unrealistic to exist in a society that thrives on rewarding individualism.

the sentence after dah 'that people can ....' tells more about beleif mariana has ?
can we write it as
Mariana believes that altruism exists even in today’s day and age , and Mariana believes that people can help others without any selfish motives is not an idea that is too unrealistic to exist in a society that thrives on rewarding individualism .

basically dash is telling what marina beliefs is .
 e-GMAT Discount Codes Optimus Prep Discount Codes Math Revolution Discount Codes
Manager
Joined: 09 Mar 2016
Posts: 223
Re: Some anthropologists believe that the genetic homogeneity [#permalink]

### Show Tags

15 Jan 2018, 11:04
macjas wrote:
The Official Guide for GMAT Review 2017

Practice Question
Question No.: SC 736
Page: 695

Some anthropologists believe that the genetic homogeneity evident in the world's people is the result of a "population bottleneck"—at some time in the past our ancestors suffered an event, greatly reducing their numbers and thus our genetic variation.

(A) at some time in the past our ancestors suffered an event, greatly reducing their numbers

(B) that at some time in the past our ancestors suffered an event that greatly reduced their numbers

(C) that sometime in the past our ancestors suffered an event so that their numbers were greatly reduced

(D) some time in the past our ancestors suffered an event from which their numbers were greatly reduced

(E) some time in the past, that our ancestors suffered an event so as to reduce their numbers greatly,

Is hyphen underlined or not ?
Study Buddy Forum Moderator
Joined: 04 Sep 2016
Posts: 674
Location: India
WE: Engineering (Other)
Re: Some anthropologists believe that the genetic homogeneity [#permalink]

### Show Tags

31 Jan 2018, 05:37
Hi GMATNinja generis GMATNinjaTwo

Can you help to differentiate between function of a hyphen and semicolon?
_________________

It's the journey that brings us happiness not the destination.

Study Buddy Forum Moderator
Joined: 04 Sep 2016
Posts: 674
Location: India
WE: Engineering (Other)
Re: Some anthropologists believe that the genetic homogeneity [#permalink]

### Show Tags

31 Jan 2018, 05:42
Hi GMATNinja generis GMATNinjaTwo

Can you help to differentiate between function of a hyphen and semicolon?
_________________

It's the journey that brings us happiness not the destination.

e-GMAT Representative
Joined: 02 Nov 2011
Posts: 2455
Some anthropologists believe that the genetic homogeneity [#permalink]

### Show Tags

31 Jan 2018, 20:21
1
KUDOS
Expert's post
dave13 wrote:
macjas wrote:
The Official Guide for GMAT Review 2017

Practice Question
Question No.: SC 736
Page: 695

Some anthropologists believe that the genetic homogeneity evident in the world's people is the result of a "population bottleneck"—at some time in the past our ancestors suffered an event, greatly reducing their numbers and thus our genetic variation.

(A) at some time in the past our ancestors suffered an event, greatly reducing their numbers

(B) that at some time in the past our ancestors suffered an event that greatly reduced their numbers

(C) that sometime in the past our ancestors suffered an event so that their numbers were greatly reduced

(D) some time in the past our ancestors suffered an event from which their numbers were greatly reduced

(E) some time in the past, that our ancestors suffered an event so as to reduce their numbers greatly,

Is hyphen underlined or not ?

Hello dave13,

Just to confirm, the dash (hyphens are smaller) in this official sentence is NOT underlined.

Thanks.
_________________

| '4 out of Top 5' Instructors on gmatclub | 70 point improvement guarantee | www.e-gmat.com

e-GMAT Representative
Joined: 02 Nov 2011
Posts: 2455
Re: Some anthropologists believe that the genetic homogeneity [#permalink]

### Show Tags

31 Jan 2018, 20:29
1
KUDOS
Expert's post
1
This post was
BOOKMARKED
Hi GMATNinja generis GMATNinjaTwo

Can you help to differentiate between function of a hyphen and semicolon?

To begin with, this official sentence uses a dash and not a hyphen.

Now generally, both hyphens and semi-colons are used to connect two independent clauses.

However, in the correct answer choice of this official question, the hyphen is followed by a dependent clause.

Personally, I see this usage just as an exception to the rule, an atypical usage in a one-off case.

Hope this helps.
Thanks.
_________________

| '4 out of Top 5' Instructors on gmatclub | 70 point improvement guarantee | www.e-gmat.com

Intern
Joined: 11 Jun 2017
Posts: 34
Some anthropologists believe that the genetic homogeneity [#permalink]

### Show Tags

03 Feb 2018, 14:03
Comma+Ving will modify the nearest subject which is Ancestor in A. Hence, incorrect.

Comma+Ving can be the logical outcome of preceding clause, however not in this case. Because "scientist believed...." is NOT the logical outcome of reduced population. It is "the event" that reduces the population.
Some anthropologists believe that the genetic homogeneity   [#permalink] 03 Feb 2018, 14:03

Go to page   Previous    1   2   3   [ 47 posts ]

Display posts from previous: Sort by