Write this at the top of page _____ in your INB The Peppered Moth Write this at the top of page _____ in your INB

Common in England 3 Variations: Black, White, Peppered

Draw this PUNNETT SQUARE B W BB Black BW Peppered WW White What type of inheritance is this?

Industrial Revolution 1760-1840

Case of the Peppered Moth Pollution killed lichen on trees. Coal soot coated tree trunks, turning them black.

Theory of Natural Selection The dark form is more visible on the light, lichen-covered tree. (b) On trees darkened by pollution, the lighter form is more visible. Variation in the peppered moth. Understanding Physical Anthropology and Archaeology, 9th ed., p. 29

But look at them without color vision.

Case of the Peppered Moth Moth Population 1850 1950 1972 Light Colored 95% 5% 25% Dark Colored 75% Today, about 90% of the population is light colored. Why did the population shift back to pre-Industrial Revolution composition?

DARWIN’S THEORY OF EVOLUTION Get ready to explain, with your hands: DARWIN’S THEORY OF EVOLUTION by NATURAL SELECTION Using the PEPPERED MOTH as your organism