75% of the kernels born will be Purple, the dominant gene. And, 25% will be the other color. The phenotype might be 3:1 i think, well need anything tag me :)
Yes, pH of the soil affects the colour of flower.
Flowering plants grown in acidic soil (pH<7) bears blue flowers or at has a blueish tint.
Whereas, Flowering plants grown in Neutral (pH=7) and Basic (pH>7) soil bears pink and red flowers.
A plant's flower color is determined by a complex balance between chlorophyll, beta carotene, flavonoids,etc in particular pH of the soil to give out vibrant colors like red, blue, pink, yellow,etc.
Half filled circle represent carrier in female
Parasympathetic nerves govern involuntary actions such as pupil dilation, peristalsis, gland secretions, etc.
