Login

Join for Free!
118857 members


Different people

Debate and discussion of any biological questions not pertaining to a particular topic.

Moderator: BioTeam

Different people

Postby quinny1 » Thu Jun 23, 2005 10:50 am

why have humans got different colour skin? white, black, chinese etc.... could someone explain this to me please? Skilban dont't repy as i would like a real answer to my question! thanks
biology is not just a subject its a matter of life
quinny1
Garter
Garter
 
Posts: 2
Joined: Mon Jun 20, 2005 2:23 pm

Postby skilban » Thu Jun 23, 2005 10:54 am

I feel people have different skin types due to the environment they were brought up in and over time, the colour of their skin has changed because of this, their is also the other idea of this which is that God had something to do with skin colour.
User avatar
skilban
Garter
Garter
 
Posts: 35
Joined: Thu May 12, 2005 11:32 am
Location: UK- North east

Postby Chris4 » Thu Jun 23, 2005 11:44 am

Isn't there evidence that the first man was in africa and therefore black. And as people migrated to colder climates changed skin colour? I don't know how many years this would take?

Skiban did reply :lol: .
altho he mentioned that god may have something to do with it. The way i see it - If you believe in God then he created life, the universe and everything from the beginning. Now.
Would god allow us to evolve skin colour after he created us? He would have created us as perfect - correct? And therefore as he created us we assume he created skin colour, from the beginning. Unless you are saying we all started out as one skin colour and that god after a few thousand years decided to change things a bit. I don't think many people would agree with this.
Im just pointing out that I think the idea that God had something to do with skin colour is an inane statement, if he created us.
Last edited by Chris4 on Thu Jun 23, 2005 2:48 pm, edited 1 time in total.
It's always funny until someone gets hurt. Then it's just hilarious.
User avatar
Chris4
Coral
Coral
 
Posts: 286
Joined: Mon Mar 07, 2005 4:56 pm
Location: UK


Postby James » Thu Jun 23, 2005 2:30 pm

I think it's to do with humans ability to produce vitamin D from sunlight. When humans migrated to less sunny environments, the need to absorb more sunlight for vitamin D increased. White absorbs more sunlight than black, thus enabled the human's vitamin D levels to rise again, in these sunlight deficient areas. Generally, to the furthur north/south extemities, the more white people become.
User avatar
James
King Cobra
King Cobra
 
Posts: 552
Joined: Wed Feb 23, 2005 11:00 pm
Location: England

Postby mith » Thu Jun 23, 2005 3:32 pm

I think there's a problem with classifying skin as black/white because it really isn't a correct description. The skin is darker when there are more melanin, and the skin appears "whiter" when it has less melanin. A more appropriate description would be to say white skin is "clear" since it allows more sunlight to penatrate, otherwise white would actually reflect more light than black.
Living one day at a time;
Enjoying one moment at a time;
Accepting hardships as the pathway to peace;
~Niebuhr
User avatar
mith
Inland Taipan
Inland Taipan
 
Posts: 5345
Joined: Thu Jan 20, 2005 8:14 pm
Location: Nashville, TN

Postby Navin » Thu Jun 23, 2005 3:38 pm

How are the alleles which control skin colour like?
Are they simple to comprehend.


Also, I have an aunt who has a dark skin colour who married a Danish (with white skin) and is living in Denmark. (Europe COLD)
They had 2 children of which both have white skin. Though this specimen size is rather small, is it true that in western countries like that, the white skin thing is dominant?
User avatar
Navin
Coral
Coral
 
Posts: 277
Joined: Thu Jun 09, 2005 2:23 pm
Location: Singapore (Asia Pacific)

Postby James » Thu Jun 23, 2005 4:04 pm

mithrilhack wrote:I think there's a problem with classifying skin as black/white because it really isn't a correct description. The skin is darker when there are more melanin, and the skin appears "whiter" when it has less melanin. A more appropriate description would be to say white skin is "clear" since it allows more sunlight to penatrate, otherwise white would actually reflect more light than black.


Yes, good, important point
User avatar
James
King Cobra
King Cobra
 
Posts: 552
Joined: Wed Feb 23, 2005 11:00 pm
Location: England

Postby MrMistery » Thu Jun 23, 2005 8:18 pm

The color of your skin is give by 2 genes that are not alleles. The result is a sum of dominant and recessive genes which means that the more dominant genes you have, the more melanin you will have.
Example:
Gene 1: X1x2
gene 2 X1x2
Black person has all four genes dominant: X1X1X2X2
White person has all recessive genes: x1x1x2x2

Skin color is, as said, an adaptation to the environment. It took 2 milion years to create all races of humans. Black people remained with dark skin, since they are from africa where it is hot and they need the extra melanine to absorb the light, white people did not need this feature anymore, some that lived in cold environment even needed all the light they could get
Hope it's clear
reagrds,
Andrew
User avatar
MrMistery
Inland Taipan
Inland Taipan
 
Posts: 6832
Joined: Thu Mar 03, 2005 10:18 pm
Location: Romania(small and unimportant country)

Re: Different people

Postby kandarp shah » Thu Jun 23, 2005 9:01 pm

[quote="quinny1"]why have humans got different colour skin? white, black, chinese etc.... could someone explain this to me please? Skilban dont't repy as i would like a real answer to my question! thanks[/quote

i believe in darwinizm.........ya that's why people has defferent traits,color,etc..... :)
User avatar
kandarp shah
Coral
Coral
 
Posts: 108
Joined: Sat Jun 04, 2005 2:28 pm
Location: USA


Return to General Discussion

Who is online

Users browsing this forum: No registered users and 6 guests