...
Post A Reply
my profile
|
directory
login
|
register
|
search
|
faq
|
forum home
»
EgyptSearch Forums
»
Deshret
»
Shedding light on skin color
» Post A Reply
Post A Reply
Login Name:
Password:
Message Icon:
Message:
HTML is not enabled.
UBB Code™ is enabled.
[QUOTE]Originally posted by rasol: [QB] [QUOTE]Originally posted by rasol: [b]The photoprotective properties of a highly melanized skin and the recent African origin of modern humans suggest that the ancestral phenotype is one of the relatively dark skin (Jablonski and Chaplin 2000; Rogers et al. 2004). [/b] [/QUOTE]Rogers: [i]Over 1.2 million years ago, the human ancestors in Africa began to lose their hair and they came under increasing evolutionary pressures that killed off the progeny of individuals that retained the inherited whiteness of their skin. [b]By 1.2 million years ago, all people having descendants today had exactly the receptor protein of today's Africans; their skin was black[/b], and the intense sun killed off the progeny with any whiter skin that resulted from mutational variation in the receptor protein. However, the progeny of those humans who migrated North away from the intense African sun were not under the evolutionary constraint that keeps human skin black generation after generation in Africa.[/i] Jablonski: [i]Dark skin evolved in conjunction with the loss of 'fur' and is the [b]original[/b] condition of homo sapiens.[/i] [/QB][/QUOTE]
Instant Graemlins
Instant UBB Code™
What is UBB Code™?
Options
Disable Graemlins in this post.
*** Click here to review this topic. ***
Contact Us
|
EgyptSearch!
(c) 2015 EgyptSearch.com
Powered by UBB.classic™ 6.7.3