There are people who say homosexuality is genetic. I heard someone say that there is an adultery gene, and say what the name of the gene was (It had a number in it), and that it could be 'triggered' by certain marital problems. Anyway, there is something researchers say: correlation doesn't prove causation. if there is a correlation beween a gene and a sin, there could be something else behind it.There may be something like 'spiritual genetics' or spiritual heritage. I wouldn't say it is a 'generational curse' per se, but maybe similar. God visits the iniquity of the fathers on the third and fourth generation, so there are some spiritual issues that can go down the family line, in this case, God visiting the sins of the fathers on the descendants. Of course it is possible for someone to break free of this, like we see in Ezekiel 18, and of course the New Testament.If someone had an adulterous ancestor, and he was adulterous, and his son was adulterous, and it was either learned, or that weakness was inherited, it could be inherited without it being caused by a gene, but since there was a common ancestor, the same gene might show up