A woman with a second Rh positive blood and having a son with a first Rh

A woman with a second Rh positive blood and having a son with a first Rh negative blood filed a lawsuit against a man with a third Rh positive blood to establish paternity. can he become a father?

According to the rule of genetic inheritance of blood groups, a woman with a second blood group and a man with a third blood group can have a child with the first blood group, provided that both have heterozygous genotypes. According to the rule of inheritance of rhesus, a woman with a negative rhesus and a man with a positive rhesus may have a child with a negative rhesus. Consequently, a man can be the father of this child.