Haha a biology class. As most people have already told you, inbreeding isn't as serious in reptiles as humans, because we are massively more complicated, just in the fact we are warm blooded.

Also whenever you are breeding any morph it is some form of inbreeding(unless from other W.C.s Pastels etc). Some morphs are specifically line bred for the purpose of creating better morphs. The people doing a lot of the cutting edge breeding are big animal people and if they saw a defect, I am almost POSITIVE they would discontinue it.