I don't think you can produce a serious Catholic argument about the doctrine of the Real Presence or of Transubstantiation which says anything about genetic code, or anything close to it.
1) Do you or do you not believe that at a certain and particular point in longitude where the priest raises the wafer it alchemically morphs into the actual body of Jesus Christ? Below that point, it remains flour. Above that point, it is materialistically God Himself.
2) Do you or do you not believe that man is saved by an infusion of grace into his own being, as opposed to the Scriptural understanding that Christ's righteousness is imputed to us, given as payment for our sins so that we may stand acquitted of our sins?
Answer to (2) I won't answer that. I was questioning what struck me as a mischaracterization of a teaching of the Catholic Church about transubstantiation. While I see that all theology is connects and, as my professor said one of the main problems is that you need to be able to say everything at once, I was just questioning the existence of any serious Catholic text about sacramental theology that said anything genetic happens - and now I'll add alchemical and good old-fashioned chemical. I don't want to be distracted from that.
There may be good Protestant arguments against our Sacramental Theology. But when you say what you said about genetics and alchemy you are making an argument (or, rather, NOT making an argument) against some thoology which is not ours. Just because I pick pockets, doesn't mean I also drive recklessly. Let's stick with one crime at a time here.