Among their offspring, called the F 2 \text F_2 F 2 start text, F, end text, start subscript, 2, end subscript generation, he found that 705 705 7 0 5 705 plants had violet flowers and 224 224 2 2 4 224 had white flowers. This was a ratio of 3.15 3.15 3. 1 5 3, point, 15 violet flowers to one white flower, or approximately 3: 1 3:1 3: 1 3.

These are the offspring ratios we would expect, assuming we performed the crosses with a large enough sample size. Because of independent assortment and dominance, the 9:3:3:1 dihybrid phenotypic ratio can be collapsed into two 3:1 ratios, characteristic of any monohybrid cross that follows a dominant and recessive pattern.