One of two taxonomic domains that include prokaryotes?

The image shows embryos of three vertebrate classes

Indicate the coat color and the proportion of offspring with that color for each of the following crosses of rabbits. assume all are homozygous. chinchilla x albino a) all chinchilla b) 1/2 chinchilla, 1/2 albino c) 3/4 chinchilla, 1/4 albino

What enzyme is most important for dna replication and why?