Question

complex inheritance
is it possible for two parents with type a blood to have a child with type o blood. support your answer with a punnett square.

Explanation:

Step1: Identify parental genotypes

Type A blood can have genotypes $I^A I^A$ or $I^A i$. For a child to have type O blood (genotype $ii$), both parents must carry the recessive $i$ allele, so each parent is $I^A i$.

Step2: Set up Punnett square

Create a 2x2 grid with parental alleles:

	$I^A$	$i$
$i$	$I^A i$	$ii$

Step3: Analyze offspring genotypes

From the square, 1 out of 4 offspring will have genotype $ii$ (type O blood).

Answer:

Yes, it is possible. When both parents have the heterozygous genotype $I^A i$ (both have type A blood), there is a 25% chance of having a child with type O blood (genotype $ii$), as shown by the Punnett square:

	$I^A$	$i$
$i$	$I^A i$	$ii$