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Instructions

1. Enter the alleles for each parent in the top and left boxes of the Punnett square.

2. Complete the four offspring genotype combinations in the middle of the square.

3. Enter the genotype ratio (e.g., WW, Ww, ww) in the inputs below.

4. Enter the phenotype ratio (e.g., White, Grey) based on dominant/recessive traits.

5. Click "Check Answer" to see if you're correct and increase your score!