Question

if a person with o blood type produces offspring with a person with b blood type, then what percentage of their offspring will be type o in the best case scenario? a 40% b 50% c 90% d 100%

Explanation:

Step1: Recall Blood Type Genetics

Blood type O has genotype \( ii \), and blood type B can be \( I^B I^B \) or \( I^B i \). For the best case (max O offspring), the B - type parent should be \( I^B i \) (since \( I^B I^B \) would give no O offspring).

Step2: Do Punnett Square

Parent 1 (O): \( i \) and \( i \). Parent 2 (B, \( I^B i \)): \( I^B \) and \( i \).
Punnett square combinations:

• \( i \times I^B \): \( I^B i \) (type B)
• \( i \times i \): \( ii \) (type O)
• \( i \times I^B \): \( I^B i \) (type B)
• \( i \times i \): \( ii \) (type O)

So, 2 out of 4 (50%) are type O.

Answer:

B. 50%