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Originally Posted by The12thMan";p="
Too early in the morning for me, raytri. Mark is coming home today. I'll try to remember to ask him. We used to do this kind of thing for fun (only much easier) when he was little.
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Consulting the genius! Yes!
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I think it would be helpful to use the alphabet. ABCD... for chromosomes from the MOM and abcd... for chromosomes from the Dad. AbCdEfGhIjKlMnOpQrStUvWxYz. Does that make sense?
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Yes. The problem for me is the exclusivity. If was simply mixing two 13-letter combos, the answer (I think) would be 13! x 13!. What I don't know how to do is account for possible duplicates -- making sure there's not both a "B" and a "b". Plus how to figure out the number of 13-letter combos out of a group of 26 letters.
It probably involves something like n!/n!-b!, where n is the total number of objects and b! is the size of the subset I'm seeking to count.