Still trying to figure this out, bare with me please. The science stuff is messing with my brain. So then will they get the second copy, by breeding them (roosters) back to a non-related female that came from the same breeding? Sounds dumb but if you read it like ten times you should be able to figure out what I'm trying to say. Thanks MicheleBarring in Females is sex linked meaning it it on the genes that make MALE chicks If the female is not visually barred she is NOT CARRYING the barring genes. Barring is NOT recessive.
Roos with two copies of the barring (a normal barred roo) will pass the barring to 100% of his chicks. BUT the roos from a Barred roo and a non barred hen will only carry ONE copy and will not breed true. The second copy of barring in roos comes from the hen.
FYI: Female chickens determine the gender of the chicks she has one copy of each male and female genes and the barring is only attached to her male set of genes.