Awoman with type a blood (whose father was type o) has children with a man that has type o blood. both individuals are heterozygous for the mn antigen. recall that mn blood group antigens are independent of the abo locus, and that the alleles are codominant.

pregnancy happens more and more

•there must be variation for the particular trait within a population.

•the variation must be inheritable (that is, it must be capable of being passed on from the parents to their offspring).

•individuals with one version of the trait must produce more offspring than those with a different version of the trait.good

explanation: