It is impossible for a type O+ baby to have a type ____ mother.
Q1. It is impossible for a type O+ baby to have a type ____ mother.
Answer: AB-
Explanation: Blood type O has genotype ii (no A or B alleles); an AB- mother has genotype I^A I^B and can only pass on I^A or I^B alleles, making it genetically impossible for her to have a type O child.