Question

Human blood types are determined by genes that follow the CODOMINANCE pattern of inheritance. There are two codominant alleles (A and B) and one recessive allele (o). Fill in the genotype for each person based on the description: Homozygous for the “B” allele Heterozygous for the “A” allele Type O Type AB

Answer 1

In human blood types, the alleles are designated as follows:

- A allele (genotype: AA or AO)
- B allele (genotype: BB or BO)
- AB allele (genotype: AB)
- O allele (genotype: OO)

Based on your descriptions:

1. **Homozygous for the "B" allele:**
- Genotype: BB

2. **Heterozygous for the "A" allele:**
- Genotype: AO

3. **Type O:**
- Genotype: OO

4. **Type AB:**
- Genotype: AB

So the filled genotypes are:
- Homozygous for B: **BB**
- Heterozygous for A: **AO**
- Type O: **OO**
- Type AB: **AB**