rr means the plant has pure recessive trait & rr means the plant has pure dominant trait & a yellow flowered vegetable (rr) is crossed with a yolk flowered vegetable (rr) ->  a pure dominant red flowered plant is crossed with a pure recessive white flowered plant  a pure submissive yellow flowered vegetable is crossed with a pure dominant yolk flowered vegetable & if pure dominant organism is crossed a pure recessive organism , then the offspring will have a 100% probability of being heterozygous dominant -> the offspring of the red flowered plant and white flowered plant will 100% be heterozygous dominant the offspring of the red flowered plant and white flowered plant will 100% be heterozygous dominant  the grandfather of the yellow flowered vegetable and yolk flowered vegetable will 100% be heterozygous submissive & red flower is a dominant trait in some plant -> the offspring of the red flowered plant and white flowered plant will 100% be red