A white forelock is a patch of white hair, typically at the hairline. A cross produces 1,836 people with white forelocks and dimples, 612 people without white forelocks and with dimples, 597 people with white forelocks and without dimples, and 208 people without white forelocks and without dimples. What are the genotypes of the parents

the father in the first generation probably had the recessive colorblind trait in his x chromosome. if he and his wife both had the colorblind trait, even if she had 1 recessive and 1 dominant, then that trait would be passed on to their kids.

(since you didn't attach the family tree this is just an assumption)

the electromagnetic spectrum includes, from longest wavelength to shortest: radio waves, microwaves, infrared, optical, ultraviolet, x-rays, and gamma-rays.