7. A homozygous purple-flowered short-stemmed plant was crossed with a homozygous red-flowered long-stemmed plant and the Fl phenotypes had purple flowers and short stems. When the Fl was test crossed with a double homozygous recessive plant the following progeny were produced:
52 purple flower, short stem
47. purple flower, long stem
49 red flower, short stem
45 red flower, long stem.
(a)Which characters were dominant and why?
(b) Carry out crosses to show the formation of Fl and F?