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  Topic: Southstar's thread< Next Oldest | Next Newest >  

Posts: 150
Joined: Nov. 2011

(Permalink) Posted: Dec. 13 2011,08:04   

Quote (Southstar @ Dec. 13 2011,07:43)

By the way this is one example of how the creationist would try to convince us that superevolution after the flood is real. As an answer to how 8 people gave rise to 700 allele. I have put in bold the phrase that I think is rubbish. Would you agree?

Millions of Species in a Few Hundred Years?

Some people who object to a recent-creation interpretation of Genesis point to the fact that such a view requires that all modern animal species on earth must have descended from these same species saved on the Ark. If the Ark had roughly 30,000 animals (less than 15,000 species or different kinds), how could the animals on the Ark produce millions of species within a few hundred, or a few thousand, years after the Flood? Surely this would require a faster evolutionary rate than even the most ardent evolutionist would propose.

However, it is not correct to assume that a few thousand species would have produced the millions of species extant (alive) today. There are fewer than 30,000 extant species of mammals, birds, reptiles, and possibly land-reproducing amphibians (many salamanders) that were represented on the Ark. The millions of other species are the invertebrates (>95 percent of all animal species), fish, and a few aquatic mammals and reptiles that survived in the water during the Flood. The processes of speciation discussed above need to only double the number of animal species from 15,000 to 30,000. This is certainly a feasible process based on observable science.

Evolution, defined as large-scale changes that produce one kind of organism from another kind, is not capable of producing the millions of species observed today from the 15,000 different kinds of animals on the Ark. However, the genetic potential of each kind of animal and the freedom from genetic equilibrium, combined with mutations, would allow the appearance of many different species from the few animals on the Ark.

Genetic Potential for Variation

The genetic potential to produce a wide range of variation in any animal kind or species, regardless of how these terms are defined, easily provides 30,000 different species from fewer than 15,000 different kinds. Genetic potential is the amount of variation that a kind or type of organism can produce from the genetic material that is already present. It is possible for a pair of animals to harbor nearly all of the alleles (variations of a type of gene) for their kind in their genome.

Other alleles result from mutations to existing genes (human red hair color would be a good example of this). For example, two humans (Adam and Eve?) could have all the common DNA variations (called polymorphisms) found in all ethnic groups. This would require only one DNA base difference every 667 bases between the two of them. This is hardly a difficult situation for the genomes of two people and can account for much of the genetic variation observed in people today. Rare polymorphisms are few in number compared to common polymorphisms and are likely the result of the accumulation of mutations. These rare polymorphisms are frequently referred to as personal polymorphisms, since they can be used to identify an individual.

The effects of common and rare polymorphisms can be easily illustrated by all domesticated animals and their various breeds. Dogs, cattle, hamsters, and tropical fish all have many different breeds that easily demonstrate what genetic potential is. Of course, these are all artificially selected animals and selecting for these breeds has led to a much faster rate of variation (what some call evolution) than would be expected in the wild. (Most dog breeds have been developed in the last 200 years.)

"Cows who know a moose when they see one will do infinitely better than a cow that pairs with a moose because they cannot see the difference either." Gary Gaulin

  366 replies since Nov. 08 2011,06:46 < Next Oldest | Next Newest >  

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