Genetics!!!!Desperately waiting for replies

[saltrock]

In drosophilia,blackbody colour is recessive to grey body colour.A geneticist had 3 pairs of flies with grey body designated A,B and C.He crossed A and b and obtained 109 grey bodied flies,A and C gave 80 grey bodied and 28 black bodied whilst B and Cgave 76 grey bodies flies.Explain with reason the genotype of A,B and C.

[lurflurf]

let X repersent the grey gene
and x the black gene
XX,Xx,xX are grey phenotype
xx is black phenotye
XX*Xx gives 100% grey
XX*XX gives 100% grey
Xx*Xx gives 75%grey 25% black
A*C is mixed so A and C are Xx
A*B=B*C so B is XX