How did Jesus not inherit sin if Mary wasn't sinless?

Does God have regrets?

Sometimes in scripture we see God "regretting" something. What does this mean? Does God sometimes wish he could undo something?

How can I know I'm saved?

Join Thomas and Bryan as they discuss one of the most prominent difficulties of the Christian. Assurance.

How did Jesus not inherit sin if Mary wasn't sinless?

We know Joseph didn't conceive Jesus. One of these reasons is because if he did, Jesus would have inherited Joseph's sin nature. However, Mary was a sinner. Why didn't Jesus inherit her sin?

Is "forgive and forget" biblical?

We're often told that God forgets our sin and we're to do likewise. If that is the case, how do we use sound judgement for some of our decision making? For example, I can forgive someone for robbing my house, but I probably won't ask them to housesit for me. Is that sound?

Is reaping what you sow the same thing as Karma?

Galatians 6:7 says that a man reaps what he sows. Is this the same thing as karma described by Hinduism?