I meant to continue discussing the statement that you quoted from the article I don t think that that statement was meant to refer to recombination on the molecular level but rather to the creation of new combinations of whole genes I would like to note that genetic drift was thought of long before there was any understanding of the molecular basis of genetics They knew the genes were in the chromosomes and that they could be reshuffled by crossover exchanging parts of chromosomes If crossover recombination had created a new gene I think they would have registered that as mutation That is the mindset in which I think this statement should be interpreted I think I now can answer your first question The answer is None