How is energy captured from the sun?

The main use of chlorophyll for photosynthesis is to capture the electromagnetic light energy from the sun. Sunlight is broken up into a spectrum of colors, the visible portion of which humans see in rainbows and in light shone through prisms. Chlorophyll uses the red and blue parts of the light to create the energy required for photosynthesis.

the offspring would all be white. if the parents are both white flowers then they have the genotype rr, which when crossed results in an all white punnet square.