How Does My DNA Work? Evolution Vs. Intelligent
Design - Creationism
April 26th 2006
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The subject of DNA is very much in the headlines and news but very few
have bothered to learn or understand just how this amazing molecule
works and how it makes us what we are from head to toe.
Haven't you ever asked yourself how you got your nose, eyes, ears,
fingers, toes, and everything else? How did your DNA bring all this
about? Before we answer that question we need to know just a few simple
things about DNA.
DNA is the abbreviated name for the genetic code and it is exactly that
- a code. It is a molecular string of chemical information.
DNA is located in the nucleus of our cells and is made up of smaller
molecules called nucleic acids. These smaller molecules in DNA are
arranged in a sequence, just like the letters in a sentence. The
sequence of these nucleic acids tell the cells in our body how to build
our nose, eyes, hands, feet, and everything else.
The material our body uses to build new cells comes from the food we
eat. Food is not just for energy. Food is also the "lumber" and "bricks"
the body uses to build new cells. When a cell multiplies it makes more
cells of the same size. The only way to do this is by getting new
material and that new material comes from food.
Think about it! When we were in our mother's womb we started off as a
single cell not even weighing an ounce at conception. Eventually we
developed arms, hands, legs, feet and organs such as brain, heart,
lungs, liver, stomach, until we had a complete body. It's true that the
single cell we once were multiplied into many more cells, but where did
the material come from for that one cell to multiply into billions of
more cells of equal size and eventually making a body weighing several
pounds from something that didn't even weigh an ounce in the beginning.
The material came from our mother's food.
When food is digested and broken down to its basic amino acids the
various amino acids are then rearranged in a certain sequence to form
cells that make up the various tissues and organs. What sequence these
amino acids come together in is determined by the sequence of the
molecules in DNA.
Remember, even after all our organs are formed the cells that make up
our organs are continually dying and need to be replaced. Again, the
material to make more cells to replace the ones that are dying comes
from food.
Thus, when you feed your dog a T-Bone steak your dog's DNA will make
sure that steak is digested and rearranged to form the various parts of
your dog, but when you eat the same steak your DNA will make sure that
the steak is digested and rearranged to form human parts.
The sequence in DNA differs from individual to individual and from
species to species. For an analogy think of a library where all the
books are in one language. In the library there are different books on
different topics and subjects. All the books share the letters from the
same alphabet, but the sequence in which these letters are arranged are
different from book to book. The sequence of the letters makes the
difference between a book on chemistry and a romance novel!
When scientists study genes they are studying segments of the DNA
molecule. The goal of the human genome project was to locate where the
various genes are on the DNA. Only in this way can we begin to
understand how to use genetic engineering to correct various genetically
caused disorders and maladies. Faulty genes arise from mutations.
Mutations are accidental changes in the sequence of the genetic code
caused by radiation and other environmental forces. Most biological
variations, however, are not from mutations but from new combinations of
already existing genes.
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Because they are accidents in the genetic code, almost all mutations are
harmful. Even if a good mutation does occur for every good one there
would be hundreds of harmful ones with the net effect over time being
harmful, if not lethal, to the species as a whole.
Evolutionists hope that with enough time and with enough mutations new
genes for entirely new traits will be produced leading to the evolution
of new biological kinds. There is no evidence that this can happen from
accidental changes in the sequence of the genetic code, anymore than
it's possible to change a romance novel into a book on chemistry by
accidental changes in the sequence of the letters.
At the very best mutations can only produce new varieties of already
existing genes or traits, but not new genes or new traits. For example,
mutations in the gene for human hair may change that gene so that
another type of human hair develops but the mutations won't change the
gene so that feathers or wings develop!
No one has shown that DNA can come into existence by chance! It takes
DNA to get DNA! In other words, there must already exist DNA to direct
the formation of more DNA. Yes, it is true that the individual molecules
which make up DNA have been shown to be able to come into existence by
chance. But, it has never been shown that those individual molecules can
come together into a sequence by chance to form the genetic code.
The mathematical odds of even the simplest DNA molecule coming into
existence by chance is comparable to a monkey typing the sequence of all
the letters and words in an entire encyclopedia by randomly hitting the
keys on a computer keyboard or typewriter.
Science cannot prove the existence of God but science cannot prove that
we are here by chance either. However, the scientific evidence does show
that it is not rational or logical to believe that DNA, life, and the
universe came about by chance. Belief in chance or evolution is blind
faith. On the other hand, belief in God or a Creator behind life and the
universe is not blind faith. For more information on this please read my
other articles and, especially, my essay "The Natural Limits of
Evolution" at my website
www.religionscience.com.
By Babu G. Ranganathan
The author, Babu G.
Ranganathan, is an experienced Christian writer. He has his B.A. with
academic concentrations in Bible and Biology. As a religion and science
writer he has been recognized in the 24th edition of Marquis Who's Who
In The East. The author has a website at:
www.religionscience.com
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Babu
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