dine dimers are covalent between thymidines on opposite DNA strands c) prolonged exposure to sunlight causes thymidine dimers to form d) repair proteins recognize thymidine dimers as distortion in the DNA backbone ??? ??? ??? Meiosis In additon to the repair of DNA double-strand breaks, homologous recombination is a mechanism for generating genetic diversity by swapping segmetns of parental chromo