In the mini lecture on evolutionary theory this week, you were given two examples of animals who exhibit adaptations to their environmentthe Galapagos Island finches and the black shelled crabs in Hawaii. Can you think of another animal that is well adapted to its environment? Which animal is it? Specifically, what physical adaptation(s) does it possess that make it well-suited to its environment? Based on this weeks reading, choose and discuss one theory (for example, Uniformitarianism), scientist (for example, Lamarck or Hutton), or discipline (e.g., Taxonomy, Demography, etc.) that made an impact on Darwin and influenced his theory of evolution. Please define genotype and phenotype in your own words. What is the difference between a dominant and recessive allele? Humans carry two alleles for earlobe shape: E for free-hanging earlobes and e for attached earlobes. Considering that free-hanging earlobes are dominant to attached earlobes, cross a heterozygous individual with free-hanging earlobes with an individual with attached earlobes, and complete the subsequent questions. (Hint: you will have to draw your own Punnett Square on a piece of paper in order to complete the following questions). 5a. What percentage of the offspring is homozygous dominant? 5b. What percentage of the offspring is homozygous recessive? 5c. What percentage of the offspring is heterozygous?
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