why is sequencing of eukaryotic genomes more difficult than sequencing genomes of bacteria or archaea?

yes? sounds right, but you didn’t ask a question.

genetic variation can be caused by mutation (which can create entirely new alleles in a population), random mating, random fertilization, and recombination between homologous chromosomes during meiosis (which reshuffles alleles within an organism's offspring).

answer; projective;