In ABO blood group system, allele IB is completely dominant over……..
a) IA
b) io
c) both a and b
d) none of them
Which of the following alleles are Co-dominant in ABO blood group system?
a) IA and io
b) IB and io
c) IA and IB
d) both a and b
Explanation: because both can express themselves in heterozygous condition
Which of the following allele/s is/are recessive in heterozygous state?
a) IB
b) io
c) IA
d) both a and c
A woman is homozygous for A- negative blood type and a man is AB-negative blood type. What is the probability that the couple’s child will be type B-negative?
a) 25%
b) 50%
c) 75%
d) 0%
The blood groups alleles start their expression at………..stage and keep on expressing themselves till death.
a) adulthood
b) childhood
c) early embryonic
d) all of these
Explanation: that’s why the blood group phenotype of a person never changes throughout life.
How many blood group systems have been recognized by International Society of Blood Transfusion in humans?
a) 2
b) 5
c) 10
d) upto to 30
