livingword26 said:
1. Can you provide a link to this information or a web address to support this experiment?
I have the journal reference.
G Kilias, SN Alahiotis, and M Pelecanos. A multifactorial genetic investigation of speciation theory using drosophila melanogaster Evolution 34:730-737, 1980.
I haven't found this particular one on-line, but it is referenced with comments from a professional biologist (who is also Christian) here: (Post 54)
http://www.christianforums.com/t722770&page=5
2. A lab experiment does not provide proof of the evolutionary theory, ie gene splicing that would not have occoured in nature.
If lab experiments did not help us understand what is happening in nature they would not be done. No gene splicing was involved here---only providing divided populations with different environments and different food resources. That is something that does happen in nature.
3. Were they not still flies? You say that they were different species, what was the new species created called?
Is "fly" a species? Or is it a large group of species? A new species of fly is a new species, because "fly" does not refer to a single species (as "human" or "platypus" does) but to a grouping of many, many different species (as "mammals" and "grasses" do).
I don't know what specific names, if any, were given to the new species. They may have just been given numbers as many species are.
4. Doesn't the fact that they could not bread indicate that they would never have survived in nature and therefore never would have become a new species?
No. Let's be clear on what is being spoken about. The new flies could breed. It is possible they could survive in nature, but I don't know if that was tested out. They were already new species and each one of the new species was successfully breeding and had been from the beginning of the experiment 7 years earlier.
What did not happen was successful
cross-breeding between one new species and another or between one new species and
Drosophila melanogaster (the parental species)
As long as mating happened within each new species group there was no problem with breeding.
The purpose of trying to cross-breed was to test if these were really new species. If they had only been new breeds, the cross-breeding would have been successful. The fact that cross-breeding was not successful shows that they are genuine new species and therefore this is an instance of macro-evolution.