Some dangerous traits never show on the surface — they hide behind dominant alleles, invisible until the right combination appears. When a recessive allele for "plantmonster" is masked by a dominant harmless trait, math becomes the only way to estimate how likely that hidden gene is to reappear. Using Punnett squares and genotype tables, you predict which plantfairies secretly carry monster alleles — the ones that could produce dangerous giants with dagger teeth instead of harmless dwarves with frog tongues. Those predictions determine which plants are safe to keep for mosquito control.