LEARN MORE...

Articles Summaries.edited

Content type

User Generated

Subject

Biology

School

San Diego Miramar College

Type

Homework

Uploaded By

creary0999

Pages

Showing Page:

1/4

Articles’ Summaries

Name

Affiliation

Course

Instructor

Date

Showing Page:

2/4

Articles’ Summaries

Article 1

The article by Jonathan K. Pritchard titled "How we are evolving" was published in 2012

on the Scientific American website and is available on this link

https://www.scientificamerican.com/article/how-we-are-evolving-2012-12-07/. The authors

sought to build on recent research showing that the first immigrants into the Tibetan plateau had

to contend with low oxygen levels leading to the development of a gene variant common among

Tibetans but rare among other populations. Pritchard sets out to test the hypothesis that the

Homo sapiens species has undergone considerable biological adaptation in the last 60,000 years

and that populations in disparate regions differ genetically due to natural selection. However, the

preliminary findings of their study show otherwise, there is less evidence of rapid natural

selection, and much of the changes seem to have occurred over tens of thousands of years

(Pritchard, 2012). The mechanism through which this arises is that a beneficial mutation spread

through a population in response to local environmental pressure and was carried to other regions

as populations expanded geographically. When natural selection favors a given allele, it becomes

widespread within a population with each generation, and the disfavored one becomes less

common in subsequent generations. When the environment becomes stable, the beneficial allele

will spread until it is shared among all population members.

Article 2

The article "natural selection is still shaping human evolution, find researchers" was

written by Lucy Ingham in 2017 and is available on the link https://www.factor-

tech.com/sponsored-content/28069-webinar-how-vr-ar-works-at-ford-cdm-smith-schneider-

electric/. This study reaffirms that natural selection is still taking place today. Backed by genome

Showing Page:

3/4

End of Preview - Want to read all 4 pages?

Access Now

Unformatted Attachment Preview

1 Articles’ Summaries Name Affiliation Course Instructor Date 2 Articles’ Summaries Article 1 The article by Jonathan K. Pritchard titled "How we are evolving" was published in 2012 on the Scientific American website and is available on this link https://www.scientificamerican.com/article/how-we-are-evolving-2012-12-07/. The authors sought to build on recent research showing that the first immigrants into the Tibetan plateau had to contend with low oxygen levels leading to the development of a gene variant common among Tibetans but rare among other populations. Pritchard sets out to test the hypothesis that the Homo sapiens species has undergone considerable biological adaptation in the last 60,000 years and that populations in disparate regions differ genetically due to natural selection. However, the preliminary findings of their study show otherwise, there is less evidence of rapid natural selection, and much of the changes seem to have occurred over tens of thousands of years (Pritchard, 2012). The mechanism through which this arises is that a beneficial mutation spread through a population in response to local environmental pressure and was carried to other regions as ...
Purchase document to see full attachment

Tags: Human Evolution NATURAL SELECTION environmental conditions evolutionary change evolutionary mechanisms beneficial mutation