Quote:
it means that the choc gene(recessive) is on the sex chromozone Z, roos being Homogametic(having two copies of the Z chromozome, Makes them ZZ) and Hens being Hemizygous for choc(since they have only one copy of choc or one copy of none choc gene Choc+)
so say that you were to get your hands on a chocolate rooster but only have black hens...
if you make the cross all of the resulting hens that hatch are going to be chocolate as they inherit their father Z chromozome(choc being there)
but the boys will be black as they inherit their mother's Z chromosome and their father's Z chromozome that makes them Choc+/choc and since none Choc gene Choc+(capital letter means Dominant and the "+" sign is for wildtype as its found on RedJungle fowl)...
I hope that cleared some of your questions...
it means that the choc gene(recessive) is on the sex chromozone Z, roos being Homogametic(having two copies of the Z chromozome, Makes them ZZ) and Hens being Hemizygous for choc(since they have only one copy of choc or one copy of none choc gene Choc+)
so say that you were to get your hands on a chocolate rooster but only have black hens...
if you make the cross all of the resulting hens that hatch are going to be chocolate as they inherit their father Z chromozome(choc being there)
but the boys will be black as they inherit their mother's Z chromosome and their father's Z chromozome that makes them Choc+/choc and since none Choc gene Choc+(capital letter means Dominant and the "+" sign is for wildtype as its found on RedJungle fowl)...
I hope that cleared some of your questions...