In the early twentieth century, anthropologist Franz Boas described changes in skull form among the children of Europeans who had migrated to North America. He found that the reason for these changes could not be explained by genetics. His findings underscore the fact that
A. phenotypic similarities and differences don't necessarily have a genetic basis.
B. though the environment influences phenotype, genetics is a more powerful determinant of racial differences.
C. diet affects which genes get turned off and which on, resulting in a particular phenotypic characteristic.
D. describing changes in skull form is the most accurate way to study the impact of migration on traveling populations.
E. observing changes over one generation is not enough to make conclusions about changes in genotype and phenotype.
Question 2
An examination of racial taxonomies from around the world would indicate that
A. all cultures classify races similarly.
B. the classification of racial types is an arbitrary and culturally specific process.
C. classifying racial types can best be done by considering only phenotypic traits.
D. classifying racial types can best be done by considering only genotype.
E. the best classification of racial types considers genotype as well as phenotype.
Examples of variation in leaf form.
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