Why do we multiply 2/3 x 2/3. Why aren\'t we taking into consideration the 1/3 f

Question

Why do we multiply 2/3 x 2/3. Why aren't we taking into consideration the 1/3 from each parent? Please explain.

8. (7 points) Alex, his mother, his father, and his older sister have blood type B. His younger sister and his brothers have type O. Anna, her mother, her father, and her younger brother have type A. Her sister and her older brother have type O. If Alex and Anna have a child, what is the probability the child will have blood type AB? Show your work and circle your answer. Alex: 1/3 chance , 2/3 chance IB ? Anna. 2/3 chance TII ( both parents are I i , l /3 chance ? ? (both parents are r i) Chance of t allele from Alex) x (Chance ofI allele from Anna) -(2/3) x (2/3) -4/9

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Why do we multiply 2/3 x 2/3. Why aren't we taking into consideration the 1/3 f

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