Question

Following is the Blood analysis report. Use the results on the printout to complete the chart (5pts)

Patient	Reacts with Anti A antibodies	Reacts with Anti B antibodies	Anti_Rh Serum	Blood Type
1	Yes	No	No
2	Yes	Yes	No
3	No	No	Yes
4	No	Yes	Yes
5				AB, Rh +

In humans, blood type is a result of multiple alleles: IA, IB, and iO. Based on the type of inheritance exhibited by these alleles complete the following statements .  IA is dominant over ________

IB is dominant over ___________

IAIB are said to be _____________  

Two parents who are heterozygous for type A blood . Answer the following questions.

What is the genotype of the parents?

What are the genetic makeups of all the possible gametes they can produce?

Answer 1

Alleles for blood grouping are of 3 types. They are : A, B and O.

A and B are both dominant over O, which means that anyone who is heterozygous for A and O and B and O, will have A and B blood group respectively. While A and B are both codominant meaning if someone is heterozygous for A and B, they will have AB blood group.

So we can say that IA is dominant over IO​​​​​​

IB is dominant over IO

​​​​IAIB are codominant

If two parents are heterozygous for type A blood, then it means that they have A and O allele because since A and B are codominant, one can not be heterozygous and still have A blood group.

So parents Genotype are :-

Father :- IAIO

Mother :- IAIO​​​​​​

Gametes they can produce :-

Father - IA and IO​​​​​​

Mother - IA and IO