Using the letter b= black hair and b= brown hair. what is the genotypes of the following dogs?
(a) homozygous dominant
(b) heterozygous (c)homozygous recessive

The correct answer is A). , since both of the traits are dominant, because the colors are darker than Blonde, for example. Something like Blue eyes, Green eyes, Light hair color, would be recessive, meanwhile darker hues are more dominant.

The infrared (ir) and the ultraviolet(uv) represent the two extremities of the visible spectrum (400-700nm). while ir represents electromagnetic radiation with wavelengths longer than those of visible light, uv represents wavelengths shorter than visible light