If you soak a flower in red dye it will turns the vains inside the stem and leaves red.
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No, red dye does not make a flower turn red. Flowers get their color from pigments produced naturally in their petals. Adding red dye to the water they are placed in may cause the petals to absorb the dye, resulting in a temporary change in color.
The stem of a white flower in red water would absorb the red color through its vascular system, potentially tingeing the white petals with a pink or red hue as the dye travels up the stem to the petals. The intensity of the color change would depend on the flower's ability to absorb and transport the pigment.
A red flower looks red because it absorbs all colors of light in the visible spectrum except red, which it reflects. When white light, which contains all colors, hits the flower, the red part of the light spectrum is reflected off the flower and that is what we see as the color red.
The genotype would depend on the genetic makeup of the red and blue flowers. If red is represented by 'RR' and blue is represented by 'bb', the offspring would all be Rr (heterozygous) for the flower color gene.
The roots of the madder plant are used to make a red dye called alizarin. The roots are harvested, dried, and then processed to extract the dye for various applications such as textiles and cosmetics.
basically, Things get colour by absorbing most light and reflecting only a certain part. So if you picture a rainbow, the red flower takes in all colours but red, so that is the only one you see.