Principle of Inheritance and VariationEasyBloom L3
Question
Which parental phenotypes would produce offspring with blood group phenotypes in the expected ratio of 1 type A : 1 type B?
(Blood group of mother / Blood group of father)
Options
A.Blood group of mother A / Blood group of father B
B.Blood group of mother AB / Blood group of father AB
C.Blood group of mother AB / Blood group of father B
D.Blood group of mother AB / Blood group of father O
Solution
Sol.(d) [Key Concept: ABO Blood Groups — Cross Prediction] Mother AB (genotype I^A I^B) × Father O (genotype I^O I^O) → offspring: I^A I^O (blood group A) and I^B I^O (blood group B) in 1:1 ratio. This gives exactly 1 type A : 1 type B. Other options: (a) A×B could give A, B, AB, O depending on genotypes; (b) AB×AB gives 1A:2AB:1B; (c) AB×B could give A, B, AB depending on B genotype. Only (d) AB×O guarantees 1A:1B ratio.
Create a free account to view solution
View Solution FreeTopic: Principle of Inheritance and Variation·Practice all Principle of Inheritance and Variation questions