1. a. Genotype for "O" allele: ii
b. Genotype for "A" allele: IᴬIᴬ or Iᴬi
c. Genotype for "B" allele: IᴮIᴮ or Iᴮi
d. Genotype for "AB" allele: IᴬIᴮ
e. Type "O" and type "A" parent: Iᴬi × ii
f. Type "AB" and type "O" parent: IᴬIᴮ × ii
g. Blood can be donated to: O → all; A → A, AB; B → B, AB; AB → AB
h. Can get blood from: O → O; A → A, O; B → B, O; AB → all
2. a. Possible blood types of child: A, B, AB, O
b. Possible blood types of child: A, B
c. Possible blood types of child: A, AB
3. a. Mrs. Tann’s genotype: IᴬIᴬ or Iᴬi; Mr. Tann’s genotype: IᴮIᴮ or Iᴮi; Children’s genotypes: IᴬIᴮ (AB), Iᴬi (A), Iᴮi (B); Mark’s genotype: IᴬIᴮ (AB)
b. i. Parental genotypes: IᴬIᴮ × IᴬIᴮ
ii. Possible offspring genotypes: IᴬIᴬ, IᴬIᴮ, IᴮIᴮ
iii. Phenotypes: A, AB, B
iv. Percentages: 25% A, 50% AB, 25% B
4. a. Mother’s genotype: IᴬIᴮ
b. Father’s genotype: IᴬIᴬ or Iᴬi
c. Child’s genotype: IᴬIᴬ or Iᴬi
d. Possible genotypes for children: IᴬIᴬ, IᴬIᴮ, Iᴬi, Iᴮi
e. Yes, the baby could be theirs.
Parent Tip: Review the logic above to help your child master the concept of codominance worksheet blood types.
