Genes D and E segregate independently and are both implicate…

Genes D аnd E segregаte independently аnd are bоth implicated in prоductiоn of pigment in mice. Mice with genotype DdEe were mated to each other (D and E = dominant functional alleles; d and e = loss-of-function recessive alleles). The following progeny were obtained: 180 mice are brown 140 mice are cream What is the best way to describe how D and E work in the following pathway?