Slayer

Thanks for the answers. I'll continue with this point: I didnt really get this part. Imagine a sea-creature that has no fins at all, just a straight skin. He breeds 4 babies, due to mutation, one of the babies had a "bump" on his skin, and this bump is the root of the fin [which will evolve through his lineage, but for now, this creature has only a little bump]. This creature with the bump breeds 5 babies, 2 have no bumps at all, 2 have the same bump as their mother. The last baby has a steeper bump, exactly on the same spot where the original bump started, but its just longer. And again he breeds, bump gets longer and longer through the new babies, after a long time, we get to today's fins. Isn't that really low possibility ? That the new babies keeps getting advantageous mutation, always on where the original bump was, and keeps developing the bump,through generations, into a fin. Because as far as I know, most mutations are harmful ?

Hi, Correct me if I'm wrong, I'm new to this. Genetic mutation happens randomly, and natural selection decides the direction, i.e, lets the advantageous continue their lineage. I'm not comfortable with the genetic mutation part. It seems to me that mutation it is too coincidental that forming new traits isn't really possible. Don't you think there should be a system like adaptive-mutation [which is generally not accepted, right ?], or some other system that reduces the impossibility [to me at least] of mutating new traits . To give an example, say we are in the period where underwater creatures started to develop fins. How does this happen ? Through genetic mutation, one of the new babies, named X, have weird area on his skin [where the fin will start growing after generations], the root of the fin ? X's all babies have the same area looking weird on their skin, but one of them mutated even more, and development of fin took one step more. And it kept going like this until they formed the complete fin [by complete, i mean today's fin]. But how exactly does this work ? -Do all the Xs keep having a mutation on the same spot randomly for generation after generation ? -Does the mutation on the left and right side of X happen at the same time so X grows fins on both sides ? -Doesn't the mutated baby have less chance of breeding because he looks different, doesn't he get isolated? I know he will have more chance to survive predators, but still, say too many of his kind survived. Wouldn't the females choose others instead of choosing X, because he looks weird, therefore stopping the advantageous trait continuing ? Thats all for now, I'll keep asking when I have more questions . Thanks in advance for the answers.