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.

Question

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.

Quizplus · Accepted Answer

The idea that genotypes are not the only things that control traits is best reflected in the fact that the environment plays a crucial role in determining which phenotypes are expressed, even if two individuals have the same genotype. In other words, identical genotypes can produce different phenotypes depending on environmental factors, such as nutrition, exposure to toxins, or social experiences.

The Idea That Genotypes Are Not the Only Things That