The punnett square above shows a cross between two sweet pea plants in mendel's greenhouse. both parents have purple flowers (pp).  which statement describes the offspring expected from this cross? a)50% white-flowered and 50% purple-floweredb)75% white-flowered and 25% purple-floweredc)75% purple-flowered and 25% white-floweredd)100% purple-flowered and 0% white-flowered