Explain the genetic basis of blood grouping in human population.
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Solution
In humans, the blood groups are controlled by a gene called gene ‘I’. It has three alleles, namely IA, IBand i.
Table Showing the Genetic Basis of Blood Grouping in Human Population
Allele from Parent 1 |
Allele from Parent 2 |
Genotype of Offspring |
Blood-types of Offspring |
IA |
IA |
IA IA |
A |
IA |
IB |
IA IB |
AB |
IA |
i |
IA i |
A |
IB |
IA |
IA IB |
AB |
IB |
IB |
IB IB |
B |
IB |
i |
IB i |
B |
i |
i |
i i |
O |
Concept: Deviations from Mendelism - Incomplete Dominance, Co-dominance, Multiple Alleles and Inheritance of Blood Groups, Pleiotropy
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