Discussion of everything related to the Theory of Evolution. 10
posts • Page 1 of 1 If we imagine a situation, lets say a couple
of dark colored animals will emigrate to a glacier and then be
stranded there. As time goes by, the the population will grow.
If we now imagine that they have a selection pressure for being
white (for one reason or another), how will this start to
happened? I understand the concept of evolution, but what I
don't understand is this: What does it take for an animal to be
lighter (Brown->lighter brown->white)? If there is one animal in
the population that is a bit lighter than the other animals, I
understand that it's offspring has a chance to be a bit lighter
too. But how can it be lighter than it's light parent? Does it
always has to be a mutation for the evolution to make the
animals lighter and lighter? Otherwise I cannot understand how
they can be lighter and lighter, unless there is an animal to
mate with that is already a bit lighter than the other ones.
Hope you got my point Ho