We use a Punnett square to find the combinations of alleles.Mother (BO) = B or OFather (B) = B or B (since only B is given, we assume BB)Possible combinations:B (from mother) + B (from father) = BB → Blood type BO (from mother) + B (from father) = BO → Blood type BOffspring's possible genotypes and blood type:1. BB → Blood type B2. BO → Blood type B