[Virginia-American]

While it may be true that these animals lack the ability to create vitamin C while others can, it does not mean that it is the same mutation that causes this.

That is precisely the point: it's the exact same defect in the genes of related species. See, for discussion and references, crevo debate

What you're thinking of is cases like sickle cell anemia and thallesemia (sp?) which are different diseases, caused by different mutations. Both mutations are positively selected for in areas with malaria.

It seems to me that the presence of a nonfunctional gene for a vital nutrient is evidence against intelligent design and any form of creationism that attempts to 'explain' anything more recent than the initial creation of life. Are there any orthopedic surgeons who are creationists ?

Please list some testable predictions made by intelligent design theory or creation theory. They *are* scientific, aren't they?

[Bonaparte]

In 204, you raised questions about "testibility" of Intelligent Design theory. Here is a brief essay that should cast some light on this.