psyah
June 1, 2012, 7:33pm
19
Re: Creationists
We have discussed this topic to death. But i still cannot understand how you can believe that variation does NOT ultimately lead to speciation. The only thing separating one species from another is the vast amount of variation in their genome. If you add enough variation on top of variation, how can you NOT get an entirely new species? And there is no reason to assume this variation upon variation is going to stop unless there is some grand catastrophe as befell the dinosaurs; so barring something as major as a meteor strike, there is no reason to believe that the species existing today will not continue to add variation to their genome until inevitabley branching into various different species.
We know the genome is not static, it is constantly changing. Not believing that these changes will ultimate produce a new species is as though you don’t believe that inches add up to miles.
Variation is about switching genes on or off … Speciation is about getting entirely new switches in the relay … It does not matter how many switches you switch on or off … You won’t get new ones forming as a result.