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It is normally assumed that homochirality was the result of a reproduction/selection process. Once you have a self-replicating peptide, it will replicate its original handedness. As this replication process continues and builds more complex polymeres, you can imagine that they will reflect the chirality of that first replicating peptide.
That would skip the step of acheiving homochirality.
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Leslie Orgel in his article suggest another mechanism: Self-assembly on two-dimensional surfaces, like clay or minerals. This also can lead to the domination of a certain handedness.
From what I understood this was inconclusive because, number one, it didn't select one complete handedness (it only partially selected), and further it may have been the result of previously absorbed 'optically active biomolecules' which would only exist after life exists.
I've heard of this 'template' being used to select for handedness. However, this template had to be created in the lab. Answers one question while raising at least one other.
Furthermore, the monomers of opposite handedness that are incorporated into the 'template' are chain terminators. Which presents yet more problems. I'll have to dig up a source for this besides nature which costs $199 a year and $30 per article to view. I doubt you're going to pay that just to view the quote on that one.
"The task force finds that...the unborn child is a whole human being from the moment of fertilization, that all abortions terminate the life of a human being, and that the unborn child is a separate human patient under the care of modern medicine."
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