A single gene has two codominant alleles, $A^{E}$ and $A^{F}$, together with one recessive allele, $A^{G}$. How many distinct genotypes and phenotypes can occur?
- A3 genotypes, 3 phenotypes
- B4 genotypes, 6 phenotypes
- C6 genotypes, 4 phenotypes
- D6 genotypes, 6 phenotypes