I am not understanding where any of these values come from. When I drew out the

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I am not understanding where any of these values come from. When I drew out the pedigree, I did not get these values. Please help and explain in detail.

5. (14 points) Alex, his brother, and his father all have blood type B. His mother has type AB His sister has type A. Anna, her mother, and her father all have type A. Her sister has type O Show vour work and circle vour answer. a) If Alex and Anna have a child, what is the probability the child will have blood type AB? (3 points) Alex: 1 /2 chance ?B ?. 1/2 chance IB ¡ Anna: 2/3 chance lA i, (Chance of allele from Alex) x (Chance ofI allele from Anna) ather is I" i, mother is I I oth parents are ?'? 1 /3 chance ? ? chance I I r il (b ) (3/4) x (2/3) 6/12 12 b) If Alex and Anna have a child, what is the probability the child will have blood type A? (2 points) (Chance ofi allele from Alex) x (Chance ofI allele from Anna) (14)x (2/3)-1/6 c) If Alex and Anna have a child, what is the probability the child will have blood type B? (2 points) (Chance of P allele from Alex) x (Chance of i allele from Anna) = (3/4) x (13)-1/4 d) If Alex and Anna have a child, what is the probability the child will have blood type O? (2 points) Chance of i allele from Alex) x (Chance of i allele from Anna)-(I4)x (1/3)-1/12 e) If Alex and Anna have four children, what is the probability at least one of them will have type O? (5 points) (Chance of Alex is 1 i) x (Chance of Anna is F i) x (l-none have type O) (1/2) x (2/3) x (1-.75) .228

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I am not understanding where any of these values come from. When I drew out the

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