Question
Biology Question on Principles of Inheritance and Variation
Four children belonging to same parents have the following blood groups A, B, AB and O. Hence the genotypes of the two parents are
A
Both parents are homozygous for 'A' group
B
One parent is homozygous for 'A' and another parent is homozyous for 'B'
C
One parent is heterozygous for 'A' and another parent is heterozygous for 'B'
D
Both parents are homozygous for 'B' group
Answer
One parent is heterozygous for 'A' and another parent is heterozygous for 'B'
Explanation
Solution
In 9: 3: 3: 1 ratio, (9 + 1) 10 are parental and (3 + 3) 6 are recombinants.