Well....I think genetic manipulation was going on before the flood. This is why we have legends of Pan and other creatures. We know the Israelites had to defeat the giants before they went into the promised land. And later David killed Goliath and there are other mentions throughout the bible about Giants. One with six fingers and six toes (24 in all). From what I can tell God wanted them to rid the land of the Giants. It's clear in the bible that we're not to engage in genetic manipulation. On one place it says not to plant two different kinds of seed in the same field. There's also some archeological evidence that serpent headed people existed (sort of like cone heads). Could one of these have been the serpent mentioned in the Genesis?.....who knows?. But getting back to Ham's sin......Trey Smith has a documentary out....and he seems to think that Noah inherited a certain garment from Adam. The one God clothed Adam with. Apparently it was endowed with special powers and Ham snuck in and took the garment. Ham was the great grandfather I believe of Nimrod who is credited by some for building the Tower of Babel.....but apparently Nimrod acquired the garment from Ham. Nimrod was an evil king who had his own evil type of religion. I think he wanted to rule the whole earth. But at the time of the tower it is said that they had conspired to build the tower and "nothing will be restrained from them which they had imagined to do" Which is why God mixed up the languages (to save humanity again). We now see the types of evil that some "imagine to do" with the death vax and conspiring to kill and starve everyone on earth while simultaneously altering human genetic code. As the bible says "as it was in the days of Noah....." Now the story about the garment is somewhat speculative but there are clues in some of the books which lead people to this assumption. IDK myself as I only have a rudimentary knowledge of this.