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Name. . Period ate Codominance Worksheet (Blood types) Human blood types are determined by genes that follow the CODOMINANCE pattern of inheritance. There are two dominant alleles (A & B) and one recessive allele (0). 7 Blood Type Genotype Can donate blood to: Can recgivé blood from: (Phenotype) < oO ii (OO) ‘A,B,AB and O AO oO (universal donor) _- ai AB re AB oe A,B,AB and O an ~™ (universal receiver) at os A | bor AB, A OA aso) | B PP or Fi ABB OB ao) 1, Write the genotype for each person based on the description: Bw a. Homozygous for the “B” allele b. Heterozygous for the “A” allele c. TypeO OQ d. Type “A” and had a type “O” parent e. Type “AB” A f. Blood can be donated to anybody g. Can only get blood from a type “O” donor QO 6 2. Pretend that Brad Pitt is homozygous for the type B allele, and Angelina Jolie is type “O.” What are all the possible blood types of their baby? (Do the punnett square) Looe. pape ‘ the possible blood types for the offspring produced 3. Complete the punnett square showing all t! by a type “O” mother and an a Type “AB” BOL hype A, 50% type B “©,” They have three children named Matthew, 4. Mrs. Essy is type “A” and Mr. Essy is type A,” and Luke is type “AB.” Based on Mark, and Luke. Mark is type “O,” Matthew is type this information: a. Mr. Essy must have the genotype because (AGC has blood type © b. Mrs. Essy must have the genotype c. Luke cannot be the child of these parents because neither parent has the allele 5. Two parents think their baby was switched at the hospital. Its 1968, so DNA fingerprinting, technology has blood type “AB,” and the baby has blood type “B.” Mother’s genotype: Father's genotype: Baby’s genotype: Punnett square sh Was the baby switched? or_ 8 owing all possible genotypes for children produced by this couple. sag re father. What are percentages of each offspring? does not exist yet. The mother has blood type “O,” the father So Bo Bo 
