Dp(10)1;Dp(16)1;Dp(17)1;Gata1Yeym2 mice showed much lower RBC counts (p < 0.01) and HGB concentrations (p < 0.01) than Dp(10)1;Dp(16)1;Dp(17)1 mice (Figure 3A–3B), suggesting that the Gata1s mutation causes more severe anemia by further reducing the RBC counts and HGB concentrations. This evidence concerns the gene CYGB and anemia (phenotype).