According to Genesis, God had told Adam and Eve that they could partake of anything in the Garden of Eden. However, he was specific in that they were to stay off limits from the tree of knowledge. This tree is often represented as a fruit tree, but everything is allegorical: To go and partake from the ONE tree God told you not to go to, is the same as defying God's will- If he says stay off the tree, then stay off the tree because that is will and we are meant to obey it.
However, a certain serpent, says the Bible, tempts Eve into taking a fruit from the tree. Here we see that Eve is clearly disobeying what God told them to do. The fact that she went against the mandate of God immediately qualified her as the first original sinner, and got her and Adam the expulsion from Paradise.
The crime that Adam and Eve committed in the Garden of Eden was disobeying God's will. You can also argue that their crime was trying to be like God.
After the creation was over, Adam and Eve were clearly subordinate to God. God had given them all sorts of material comfort, but had also set out rules for them. The main rule was that they could not eat of the fruit of the knowledge of good and evil. If they did so, they would be in essence setting themselves on an equal footing with God. First of all, they would be declaring that they did not have to obey him. Second, they would be taking for themselves the ability to decide which things were good and which were evil. This had been something that only God could do.
So, by disobeying God, Adam and Eve tried to set themselves up as his equals rather than as his obedient children.
adam and eve listened to the serpent and they ate the fruit which god told them not to eat . they disobeyed lord