What shall be the "correlation vs. causation" error here? I mean, if you draw an analog here, it would mean that Chinese people could get children of any race b

What shall be the "correlation vs. causation" error here? I mean, if you draw an analog here, it would mean that Chinese people could get children of any race but those would still pair up. The birds do not know which type they are but still pair up with the different morph, so its something intrinsic inherited from the genotype that influences the sexual phenotype.