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. diet affects which genes get turned off and which on, resulting in a particular phenotypic characteristic.
B. phenotypic similarities and differences don't necessarily have a genetic basis.
C. though the environment influences phenotype, genetics is a more powerful determinant of racial differences.
D. observing changes over one generation is not enough to make conclusions about changes in genotype and phenotype.
E. describing changes in skull form is the most accurate way to study the impact of migration on traveling populations.
Answer: B
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