Question

What are the possibilities of blood group of achild, If father is A' blood group and mother is B blood group​

Answer 1

Answer:

Explanation:

Human blood type is determined by co-dominant alleles. An allele is one of several different forms of genetic information that is present in our DNA at a specific location on a specific chromosome. There are three different alleles for human blood type, known as IA, IB, and i. For simplicity, we can call these alleles A (for IA), B (for IB), and O (for i).

Each of us has two ABO blood type alleles, because we each inherit one blood type allele from our biological mother and one from our biological father. A description of the pair of alleles in our DNA is called the genotype. Since there are three different alleles, there are a total of six different genotypes at the human ABO genetic locus. The different possible genotypes are AA, AO, BB, BO, AB, and OO.

Answer 2

All four blood groups are possible i.e. A,B,AB and O

Explanation:

• Blood group is determined by three gene $I^{a} ,I^{b}and I^{o}$. $I^{a} and I^{b}$ are co- dominant and $I^{o}$ is recessive to both $I^{a} and I^{b}$.
• $I^{a}$ gene specify A antigen and$I^{b}$ gene specify B antigen.

• Father has blood group A, so two genotypes are possible ; one is $I^{a} I^{a}$ and another is $I^{a}I^{o}$.
• Mother has blood group B, so two genotypes are possible; one is $I^{b}I^{b}$ and another is $I^{b} I^{o}$.
• By crossing all the possible genotype we get all four blood groups i.e. A,B,AB and O.