What are the parts of this sensory system (example: smell has olfactory bulbs; vision includes the retina and rods and cones)? I chose vision what does this mean it's for a paper give me 2-3 sentences.

The diagram shows the results when two parents are crossed. the letters represent alleles for a trait that is controlled by three different genes. which best describes this inheritance pattern? multiple allele because a trait is controlled by three different genes polygenic because the offspring have alleles from both parents multiple allele because the offspring have alleles from both parents polygenic because a trait is controlled by three different genes