Kent and Emily have a baby boy Dustin by in vitro fertilization. Dustin does not resemble either one of his parents, so they suspect that the clinic made a mistake during the procedure and implanted the wrong embryo. At Dustin\'s first well-baby checkup they insist that they get his blood type. Baby Dustin is type B-negative. Kent is A-positive and Emily is AB-positive. Given this information answer the following questions. (a) What are Dustin\'s possible genotypes? __________ (b) What are Kent\'s possible genotypes? __________ (c) What are Emily\'s possible genotypes? __________ (d) Is it possible that Dustin is Kent and Emily\'s son? __________ (e) Explain your answer in (d) __________ Carrie is AB-positive and her father is AB-negative. Carrie marries Ryan, who is AB-negative. (f) What is Carrie\'s genotype? __________ (g)What is Ryan\'s genotype? __________ (h) What are the phenotypic ratios of blood types (for both the ABO gene and Rh gene) that would be expected among their children? __________ (Show your work in a Punnett square below!) Solution Answer: a). Dustin’s possible genotypes: IA IB : Rh+ Rh+ or IA IB : Rh+ Rh- b). Kent’s possible genotypes: IA IA : Rh+ Rh+ or IA IA : Rh+ Rh- or IA i : Rh+ Rh+ or IA i : Rh+ Rh- c). Emily’s possible genotypes: IB IB : Rh- Rh- or IB i : Rh- Rh- d). Yes Dustin belongs to Kenta and Emily’s son. e). The gamete, IA: Rh+ of Kent’s and the gamete, IB: Rh- of Emily’s fuse to produce IA IB : Rh+ Rh- (AB-positive). Rh+ is dominant over Rh- IA & IB are codominant. f). Carrie’s genotype (AB-positive): IAIB: Rh+Rh- g). Ryan’s genotype (AB-negative): IAIB: Rh-Rh- IAIB: Rh+Rh- x IAIB: Rh-Rh- IARh- IBRh- IARh+ IAIA Rh+Rh- (A+) IAIBRh+Rh- \\ (AB+) IA Rh- IAIA Rh-Rh- (A-) IAIB Rh-Rh- (AB-) IARh- IBRh- IARh+ IAIA Rh+Rh- (A+) IAIBRh+Rh- \\ (AB+) IA Rh- IAIA Rh-Rh- (A-) IAIB Rh-Rh- (AB-).