In dogs locus B determines pigment color (B-black, b-brown pigment) and locus E determines deposition of that pigment on the hair (E- allows deposition, e-prevents deposition). A black lab and a brown lab are mated and produce one yellow lab. a) What are the genotypes of the parents? b) What are the possible genotypes of the yellow lab? c) Explain the epistatic relationship between these two loci and how you determined the black, brown and yellow lab genotypes..