Since your mom is type A, she could have two copies of allele A or one copy of allele A and one copy of allele O. In eit

[answerhappygod]

Since your mom is type A, she could have two copies of allele A
or one copy of allele A and one copy of allele O. In either
case, she is type A. Your father could have two copies of allele B
or one copy of allele B and one copy of allele O. Let's talk about
a child with type O blood and answer these questions:
1. What is genetic inheritance?
2. What is genetic variation?
3. Among the three alleles of human ABO blood group, which
is/are dominant, which is/are recessive?
4. What is homozygous? What is heterozygous? Are the parents
homozygous or heterozygous for the A or B allele if the son
has type O blood?
5. Predict the possible blood types of the children from these
parents. Use a Punnett square to solve this problem. ( You
will need to perform multiple Punnetts to get this answer)
6. What are the probabilities (%) of the children’s possible
blood types?