Answer:
both parents are heterogeneous
Explanation:
This can be determined by a punnet square. If a punnet square is created with two heterogeneous parents (example: Bb x Bb), it will result in a 1:2:1 ratio for the genotypes. 1 with two dominant alleles (BB), 2 with one dominant and one recessive allele (Bb), and 1 with two recessive alleles (bb). 1 BB-2 Bb-1 bb