Wouldn't the child's blood type then be A?
It's about a question I have in biology, and I'll show you a picture right away.
It is about which blood group the child will get if both parents have A0.
My answer would be blood type A because A is more dominant than 0, right?
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Either AA = blood group A
or A0 = blood group A
or 00 = blood group 0
Then you did not fully understand how the inheritance of features works. Each person usually has two copies of each gene, which can also be different variants (alleles) of this gene.
When two people testify to a child, each parent inherits only one of his two copies of each of his genes to the child. The child has inherited from each gene a copy of his father and a voon of his mother.
The child in your example can therefore inherit the allele A or the allele 0 from his father and also the allele A or the allele 0 from his mother. It then has the allele combination AA, A0 or 00. In the first two cases, it has the blood group A (in the second case just because A is dominant with respect to 0) and in the third the blood group 0.
The child has the blood group A with 75% probability.
This is divided into 25% blood group AA and 50% blood group A0.
To 25% probability the child has the blood group 0 (00).
best regards
gregor443