Which are necessary to make dna replication semi-conservative? i) separation of the strands by rna polymerase ii) complementary base pairing iii) use of a pre-existing strand as a template

In guinea pigs, black fur (b) is dominant over white fur (b). cross a heterozygous (hybrid) black guinea pig with a homozygous (purebred) white guinea pig. complete a punnett square, identify the genotype(s), phenotype(s), and probability (% and fraction) that the offspring will be black and white?