Nice try, however, since these were not sexual creatures you need to show how such a thing happened. Further, since single-celled creatures are not sexual, and sexual creatures are multi-celled you first have to jump into multi-celled creatures (which do not exchange genes) or propose a way in which both multi-cellularity and sexual differentiation occurred in one gigantic jump. Sounds like a miracle to me. Sounds to me like sexuality is a fairly obvious way to regularize the process of genetic exchange we observe in, for example, mushrooms, as they change from a chemically co-ordinated community into a physically congruous creature.
Sounds to me like sexuality is a fairly obvious way to regularize the process of genetic exchange we observe in, for example, mushrooms, as they change from a chemically co-ordinated community into a physically congruous creature. Oh sure, just say 'abracadabra sis-boom-bah' and you get sexuality. Tell me another joke. For one thing you need diploid organisms for it, for another you need a system to mix the features of the two sexes correctly. For another you need sexual organs, and a totally new reproductive system. Yeah sure, just 'abracadabra' does it.