To determine the possible allele combinations for a person with blood type B, we need to understand the genetic basis of blood types.
Human blood type is determined by the ABO blood group system, which involves three alleles: A, B, and O. Each person inherits two alleles, one from each parent, resulting in his or her specific blood type.
The combinations of these alleles result in the following blood types:
- Blood type A: AA or AO
- Blood type B: BB or BO
- Blood type AB: AB
- Blood type O: OO
For a person to have blood type B, the combinations of alleles [tex]\( B \)[/tex] and [tex]\( O \)[/tex] should be such that the B antigen is expressed. This can occur in the following cases:
- The person inherits a B allele from one parent and another B allele from the other parent, resulting in the combination [tex]\( BB \)[/tex].
- The person inherits a B allele from one parent and an O allele from the other parent, resulting in the combination [tex]\( BO \)[/tex].
Therefore, the combination of alleles that a person with blood type B can have are [tex]\( BB \)[/tex] and [tex]\( BO \)[/tex].
This means that the possible allele combinations for blood type B are:
[tex]\[ BB \quad \text{ or } \quad BO \][/tex]
