Please read the "more like mum or dad?" section. .

But what if the mother is homozygous (same sequence as above) and the father is heterozygous ? In that case the child will either be homozygous like the mother, or heterozygous like the father. The child will get an A from the mother's AA, but either an A or a T from the father's AT. He/she will be AA like the mother or AT like the father. For that particular sequence, the child just cannot be 50% like each parent, but will be inevitably be 100% like the mother OR to the father, and 50% like the other parent.