Question for those who believe in EVOLUTION about Natural Selection?

Question

Natural selection only works with the genetic information available and tends only to keep a species stable. How would you explain the increasing complexity in the genetic code that must have occurred if evolution were true?

Answer 1

This is a brief introduction to the general problem of complexity theory-
"Theories Collide:
A Discussion of Control Theory,
General Systems Theory and Chaos Theory
in Relation to Complexity "
http://www.mediasense.com/athena/complexity.htm
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This is specific to biology and to increasing genetic complexity:
http://www.pnas.org/cgi/reprint/97/9/4463.pdf

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The second article is actually the more interesting one.

Answer 2

Simple. Let's start from bacteria. Being one-celled, bacteria are not nearly as "fragile" as multi-cellular life where you need a pretty precise recipe on how to construct the living thing. Bacteria, unlike eukaryotes have circular DNA and can pretty much gobble up and incorporate any DNA they run into.

Now once you reach the multicellular stage, very large changes to the DNA will most certainly fatal. Triploidy, i.e. having three sets of chromosomes is among animals almost always fatal, though interestingly not so with plants. With plants it is entirely possible through polyploidy to have the daughter plant be of a different species to its mother plant.

Anyway, the changes in the genetic code for higher level animals then have to be relatively small. Most mutations are deletions, additions, changes of single amino-acids, or deletions or duplications of segments. So that's how you can get a genetic code of a species to grow. Duplications or even multiplications of segments produce reduncancies, then mutations affect each segment differently over time so that some of the segments can now mutate into new genes which perform different functions. If each of these is beneficial to the survival and reproduction of the individual then these changes will spread over the entiire population.

Just like information is added, information can also be lost. the Y chromosome haas been steadily losing genes due to it's inability to recombine. In many marsupials the Y chromosome contains only the SRT gene, the gene that triggers the construction of a male body in lieu of a female one. When the chromosome is completely eroded, the SRT can jump to the next autosome, and so on.

Oh and finally, the complexity of an organism is not correlated very much with the number of genes or chromosomes that the organism has. Humans are nothing to write home about in both of these categories.

Answer 3

Who says natural selection tends to keep a species stable? What positivist tommyrot! Many species die out because paths chosen to survive in some long-gone environment make them unviable under conditions that have changed too fact for evolution to keep up. This is only one of many things that happen.

As for complexity, what is the problem here? I don't understand why you have asked this question. How could the genetic code not get more complex as time goes by? I would be surprised if DNA were not full of seemingly useless junk and artifactual genes.

Have you even read a book about evolution or natural selection? May I suggest Darwin, followed by E. O. Wilson, then perhaps some Dawkins (not his atheist screeds for now, though they are edifying), and maybe even a dollop of Trivers?

Answer 4

LOL, WUT?

Let me save you the work:

Claim CF003:
How could information, such as in DNA, assemble itself?
Source:
Brown, Walt, 1995. In the Beginning: Compelling evidence for creation and the Flood. Phoenix, AZ: Center for Scientific Creation, p. 13.
Response:
This question is based on some major misconceptions (addressed below). Its overriding logical error, however, is that it is an argument from ignorance. One's inability to find an answer to a question does not imply that the question has no answer.


Information is not meaning and does not, per se, imply any special structure or function. Any arrangement implies information; the information is how the arrangement is described. If a new arrangement occurs, whether spontaneously or from the outside, new information is assembled in the process. Even if the arrangement consists of shattering a glass into tiny pieces, that means assembling new information.


Nothing needs to assemble itself. Evolution and abiogenesis do not exclude outside influences; on the contrary, such outside influences are essential. In abiogenesis, it is observed that complex organic molecules easily form spontaneously due to little more than basic chemistry and energy from the sun or from the earth's interior. In evolution, information from the environment is communicated to genomes indirectly via natural selection against varieties that do not do well in that environment.

BTW please go back 2 school, most of your quiestion have their answers on a 4th grader science book. Also you don't "believe" in evolution, it's a fact, fact = true. You can either accept it or not, doesn't make it less of the truth.

Answer 5

You need to read more in general.

"Natural selection only works with the genetic information available"

Of course. What else is involved? Divine intervention? Prove it.

There is no logical connection between your first sentence and your question.

Ms. Cupcakes understands Aristotle. Pay more attention to her answers.

Answer 6

sorry dear, you obviously do not understand how evolution works judging from your incorrect assertion. and although certain genes in the genome may at one time have been selected for, these genes do not remove themselves from the genome if they are no longer useful. the human genome is chock full of genes that have been turned off for one reason or another and it is the accumulation of these genes from one generation to the next that are still present in current humans that account for the complexity of the genome you speak of.

Answer 7

Information increases by a number of methods, most notably gene duplication.

By the way, men who use female avatars go against God. Read the Bible.

Answer 8

You will find the arguments for your questions and many more in Darwin's evolution of the species book.

Answer 9

It's called random mutation. Mutation and natural selection work in concert. That's how God designed it. However, it is also know that mutation and natural selection are ony one of several natuiral processes that contribute to evolutionary change.

Answer 10

You have absolutely no idea what you are talking about. Did someone put you up to this without giving you some real facts?
You are making a fool of yourself.
Try learning some facts.