CSEC Biology · May/June 2012 · Paper 2 · Question 4(b)

Black fur colour is controlled by a dominant allele, B, and brown fur colour by its recessive allele, b. This characteristic is NOT sex-linked. Give the genotypes of the parents and offspring of a cross between a black male and a brown female that produces ½ black offspring and ½ brown offspring. Show all the steps in the working of this problem.