Each plant inherits 1 **allele** for flower color from each **parent**.

The 2 **alleles** **segregate** (separate) and end up in different **gametes** during
meiosis.

**Random fertilization** yields predictable
offspring ratios:
3:1
**phenotypic** ratio,
1:2:1
**genotypic** ratio.

These ratios can be modeled by a Punnett
square: list all the possible female `gametes` along one side
and all the possible male `gametes` along the other side, then combine the gametes to produce offspring.