I had been forced to seek out an answer when all three points were brought out in a debate against a biology professor in Long Beach, California. As it turns out, evolutionists who know something about these problems don't consider them to be an argument for evolution. Instead, these abnormalities represent fetal development problems, and have nothing at all to do with ancestry. Even more serious abnormalities do occur in a host of expressions, which bear no resemblance at all to any possible ancestor. Thus each cell possesses, in principle, the information necessary to grow into muscle, bone, teeth, blood, nerve, or organ.
Normal development requires an amazing sequence of events.
Growth of each component must occur at the proper time and to the proper extent. Throughout the growth, a variety of proteins are secreted which trigger the growth. The lack of the protein trigger, or the improper amount, or faulty timing will produce abnormal development. The marvelous DNA code oversees and governs this development in a healthy environment. But if the environment undergoes some sort of shock, this intricate sequence could be interrupted.