Thank you Susan!!!
I am trying to be sure I understand completely. I used B to denote egg color.
I gathered from the article that egg color is simple dominant.
Since one of the pullets grew up to lay pink eggs, the cock would have to be carrying a recessive allele for non blue eggs (I'll name him Bb), as well as one of the hens in that pen (I'll name her Bb as well) thus creating the pink egg layer, right? I do not know definitively regarding what color egg the cock was hatched from, since he wasn't hatched here, although I'm sure it was from a blue egg because I know the breeder well.
The hens that were in that particular pen have been culled (due to age). But regardless, that would still mean that the cock is not completely dominant for blue eggs right? So he would be Bb instead of BB?
So how does an off colored egg layer happen from a pullet that hatched from a blue egg?
Is it because the offspring only receive one allele from each parent? So in the case of a Bb cock mating with a Bb hen (a hen that lays blue eggs but carries the recessive allele), there would be a 25% chance that the chicks inherit the recessive trait for non blue eggs (bb)?
Sorry if I am making this more difficult than it is.
I am not well versed in genetics. Lol