The Idea That Genotypes Are Not the Only Things That

question 90

Multiple Choice

The idea that genotypes are not the only things that control traits reflects the fact that

• A) ​dizygotic twins are virtually genetically identical while fraternal twins are not.
• B) ​each genotype can produce a variety of phenotypes, depending on the environment in which a person lives.
• C) ​recessive genes are more commonly expressed than dominant genes, especially in cases of polygenic inheritance.
• D) ​the environment has little impact on behavior, as has been demonstrated in the results of the nature-nurture question.

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