Question

In birds, females are the heterogametic sex (ZW) and males are homogametic (ZZ). The feather color gene in pigeons is on the Z chromosome with dominance expressed as red > blue > brown. A female from a true breeding red line is crossed with a male from a true breeding brown line to yield an F1 male. In another cross, a female from a true breeding blue line is crossed with a male from a true breeding brown line to yield an F1 female. The F1 male and F1 female are crossed. What are the genotypes of these two F1 individuals and what are the expected proportions of genotypes and phenotypes (including sex) from the resultant F2 progeny ?