"Seeing Red" Questions
Mammal eye retinas have rod-shaped photoreceptors sensitive to any wavelength light. These rods allow black and white (gray scale) vision. Typically, mammals also have cone-shaped, color-sensing photoreceptors. Most mammals have dichromatic vision (having cones for blue and green light).
Read the article carefully then answer the questions in complete sentences on a separate sheet of paper.
- What could have happened many millions of years ago to cause one group of primates to start evolving into separate groups of New World and Old World primates?
- Describe how trichromatic vision is different from dichromatic vision.
- Traditionally, why did scientists think primates developed color vision?
- Why would monkeys prefer young, red leaves ?
- Howler monkeys started Gerald Jacobs thinking. Why?
- What are the names of the four Old World primates studied in Uganda?
- How do the diets of these trichromatic primates support Lucas' theory?
- What evidence from Neotropical primates does not support red color vision evolving for fruit eating?
- Describe how a simple genetic mutation might allow development of a trichromatic primate from dichromatic stock.
- The scientists mentioned in the article work at which three universities?
- List the three countries where the field studies took place and whether those areas are considered part of the New World or Old World.
- Compare and contrast placental and marsupial mammals.
Moffat, Anne Simon. "Seeing Red". Science. Jan 25, 2002. Vol 295. pp615.