they have either pink or yellow flowers
Orpine?
they grow in a cluster
a small bush with pink, purple or white flowers.
Duranta Repens
The answer is all of the produced flowers would be Pp
Could be lilac.
Watermelons have both male and female flowers on the same plant. It's easy to tell the difference because the male flowers have powdery pollen-filled anthers and the female flowers have an ovary below them that looks like a tiny watermelon.
There are a few types of prickly plants which have purple flowers. the most common plant that meets this description is the cactus.
It's phenotype (I think this is correct but i am not 100% sure)
Could be lilac.
Alyssum flowers symbolize beauty. Alyssum is a perennial plant with yellow, white, pink or purple flowers.
It's weed that is purple caused by the sunlight during the growing process