Blood Group Inheritance

Blood Group Inheritance and Genotype Analysis Step 1: Understanding Blood Group Inheritance Blood group inheritance follows Mendelian genetics. The genotypes are determined by the alleles inherited from the parents: Blood group A : Genotype I A i (A allele and O allele). Blood group B : Genotype I B i (B allele and O allele). Blood group AB : Genotype I A I B (both A and B alleles are expressed). Step 2: Analyzing the Given Parental Blood Groups Now, let's analyze the parental blood groups and their possible offspring: Father's blood group: B, so his genotype is I B i . Mother's blood group: AB, so her genotype is I A I B . Child's blood group: A, meaning the child must have inherited the I A allele. Therefore, the child’s genotype is I A i, receiving I A from the mother and i from the father. Step 3: Conclusion Thus, the genotypes of the father, mother, and child are: Father: I B i Mother: I A I B Child: I A i Therefore, the correct answer is Option (A) .

Chapter Questions
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