I'm wondering about the origins of genetic recombination. During crossover new chromosomes are created. They have different allele combinations from the original two chromosomes. This process allows the combinatorial explosion needed for biological diversity. I am puzzled by the accuracy of this very complicated process of generating new genetic information.
Starting from single cell, When did the first genetic recombination appear? How did it come to existence? In my understanding, it could not have been the result of evolutionary process since genetic recombination must be done right at the first attempt.