No, egg color is not sex linked. Both parents contribute genetic material and since the blue shell trait is dominant, only one copy is required to get a blue shell layer. It's also why crossing your EEs with other breeds results in dramatically fewer blue layers after the first generation -- when all of the first generation has only a single copy of the gene, they only pass along that trait half the time.Well, I wonder... it may have to do with which parent was the blue egg layer... would not, the males pass their genes to the pullet offspring and mums to their sons?