Home › NEET UG › Biology › Principles Of Inheritance › In ABO blood grouping, the I^A and I^B alleles a…
In ABO blood grouping, the I^A and I^B alleles are:
AIdentical alleles
BCo-dominant when both are present — both A and B antigens are produced
CIncompletely dominant (giving an intermediate antigen)
DRecessive to i
Answer & Solution
Correct answer: B. Co-dominant when both are present — both A and B antigens are produced
**I^A and I^B are co-dominant**: when both are present (genotype I^A I^B), **both A and B sugars** are produced on the red-cell surface → blood group **AB**. Both alleles are dominant over i.
Related questions
How many chromosomes are there in a normal human cell?The gain or loss of a single chromosome is called:Turner's syndrome in human females results from the loss of:Down's syndrome results from an extra copy of chromosome:In sickle-cell anaemia the red cell changes from a biconcave disc to a:A heterozygous female for haemophilia is called a:Morgan carried out his crosses using:Who proposed the chromosomal theory of inheritance?