Cancer and Genetics

One of my brother is curious about the verse Deuteronomy 5:8-9 and its meaning. Lets see the verse:

 Deuteronomy 5:8-98Thou shalt not make thee any graven image, or any likeness of any thing that is in heaven above, or that is in the earth beneath, or that is in the waters beneath the earth: 9Thou shalt not bow down thyself unto them, nor serve them: for I the Lord thy God am a jealous God, visiting the iniquity of the fathers upon the children unto the third and fourth generation of them that hate me,

 This means these people are corrupted going against God's will, otherwise known as the good word, science, technology. They made their own rules for fun and pleasure. Like adopting sexual practices not advised by the Bible. Bible says one man and one woman will be joined into one. Treat the woman with respect. Any corruption would result in diseases like cancer which would be passed to the third and fourth generation.