List of top Botany Questions on Solutes from soil to plants asked in GATE XL

In a genetic cross between two pure-line parents differing in the two independently segregating traits, plant height (tall vs dwarf) and flower color (purple vs white), all the F1 plants were tall with purple flowers. In a testcross population involving these F1 individuals, the expected percentage (%) of dwarf plants with purple flowers would be ______ (in integer).
Which of the following statements is/are {CORRECT with reference to rubber production from plants?}