Question

Solve this problem. ( For our Biotechnology )
A father of four children has blood type A. The mother has blood type B. Explain why their first children has blood type O.

Answer 1

Do you have the specific genotype for each parent?

Answer 2

Anyway, for this family to have at least one O blood type child, the parents must be heterozygous of their A and B blood type.
For example,
Dad blood genotype: A/i
Mom blood genotype: B/i
* You nned to know that A and B here is dominant trait while (i) is the recessive trait.
Using Mendel cross, the children will have the following blood types;
1. A/B (AB blood group)
2. I/i (O blood group)
3. B/i (B blood group)
4. A/i (A blood group)

Answer 3

For 2. Correction: i/i

Answer 4

Great Job @bpaulorg ! Keep up the good work.

Answer 5

wow! thanks!