Understanding through Discussion


Welcome! You are not logged in. [ Login ]
EvC Forum active members: 87 (8929 total)
Current session began: 
Page Loaded: 08-25-2019 6:43 PM
26 online now:
AZPaul3, JonF, Tanypteryx, Theodoric (4 members, 22 visitors)
Chatting now:  Chat room empty
Newest Member: Jedothek
Post Volume:
Total: 860,450 Year: 15,486/19,786 Month: 2,209/3,058 Week: 67/516 Day: 67/31 Hour: 1/11


Thread  Details

Email This Thread
Newer Topic | Older Topic
  
Author Topic:   Problems with evolution? Submit your questions.
Phage0070
Inactive Member


Message 566 of 752 (606660)
02-27-2011 3:36 PM
Reply to: Message 561 by Tram law
02-25-2011 6:42 PM


Tram law writes:

How does natural selection relate to evolution? Is it something that is completely different than evolution? Can natural selection happen without evolution?

Natural selection is one mechanism of evolution. Suppose you have cows which due to genetic variation have different amounts of white and black spots. If you as a farmer were to go out and select only a few of the blackest cows to breed, then over time we would expect your herd of cows to tend toward being darker overall.

Since you as a farmer are doing the selecting that is "artificial" selection. "Natural" selection would be something like cow-eating wolves being able to eat the lighter cows more easily, which meant darker cows were more often able to survive to breed. Or maybe the lighter cows tended to get skin cancer more often and thus were not as prolific.

This sort of natural selection can happen without evolution occurring for a variety of reasons. For example if there wasn't any genetic variation in the population; if all the cows were genetically identical and never experienced mutations, genetic drift, transcription errors, etc... then the selection wouldn't effect anything.


This message is a reply to:
 Message 561 by Tram law, posted 02-25-2011 6:42 PM Tram law has not yet responded

Newer Topic | Older Topic
Jump to:


Copyright 2001-2018 by EvC Forum, All Rights Reserved

™ Version 4.0 Beta
Innovative software from Qwixotic © 2019