Question

1. two other parents think their baby was switched at the hospital. the mother has blood type a, the father has blood type b, and the baby has blood type ab.

a. mothers genotype: ____ or ____
b. fathers genotype: ____ or ____
c. babys genotype: ______
d. fill in the punnett square below that shows the babys genotype as a possibility:

e. was the baby switched? __________

Explanation:

Step1: Determine mother's genotype

Blood type A can have genotypes \(I^AI^A\) or \(I^Ai\)

Step2: Determine father's genotype

Blood type B can have genotypes \(I^BI^B\) or \(I^Bi\)

Step3: Determine baby's genotype

Blood type AB has genotype \(I^AI^B\)

Step4: Create Punnett square

If mother is \(I^AI^A\) and father is \(I^BI^B\)

	\(I^B\)	\(I^B\)
\(I^A\)	\(I^AI^B\)	\(I^AI^B\)

If mother is \(I^AI^A\) and father is \(I^Bi\)

	\(I^B\)	\(i\)
\(I^A\)	\(I^AI^B\)	\(I^Ai\)

If mother is \(I^Ai\) and father is \(I^BI^B\)

	\(I^B\)	\(I^B\)
\(i\)	\(I^Bi\)	\(I^Bi\)

If mother is \(I^Ai\) and father is \(I^Bi\)

	\(I^B\)	\(i\)
\(i\)	\(I^Bi\)	\(ii\)

Step5: Check if baby is theirs

Since there are scenarios where baby with \(I^AI^B\) (AB blood type) can be born to these parents (e.g., \(I^AI^A\times I^BI^B\), \(I^AI^A\times I^Bi\), \(I^Ai\times I^BI^B\), \(I^Ai\times I^Bi\)), the baby was not switched

Answer:

a. \(I^AI^A\), \(I^Ai\)
b. \(I^BI^B\), \(I^Bi\)
c. \(I^AI^B\)
d. (shown in step4 examples)
e. No