http://en.wikipedia.org/wiki/Original_sin
Adam and Eve's sin, as recounted in the Book of Genesis is sometimes called in Hebrew החטא הקדמון (the original sin), on the basis of the traditional Christian term. But the term used in classical Jewish literature is חטא אדם הראשׁון (the sin of the first man, or of Adam).
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The more modern liberal branches of Judaism, such as Reform Judaism and Conservative Judaism, which see no "evil" other than the evil actions of human beings, disagree with traditions that identify the serpent with Satan. Eve's only transgression was that she disobeyed God's order. Adam was with her the entire time and at no time stopped her. Therefore, it is incorrect to blame Eve alone. Adam and Eve were expelled from the Garden and had to live ordinary, human lives. In other words, they had to "leave home" and grow up and live as responsible human beings. If they had never eaten from the forbidden tree, they would never have discovered their capacity to do evil. God gave Adam and Eve free will when he created them, but it was not until they ate the fruit that they became aware of the possibility of choosing to do evil or to do good, as they originally had no knowledge of both.
that page also cites Ezelekiel 18:20 which apparantly says that children are not to be held accountable for their parents sin.