Which of the Following Best Describes the Relationship Between Genes

Multiple Choice

Which of the following best describes the relationship between genes and traits?

A) Physical traits are usually determined by a single gene pair, whereas psychological traits are usually determined by multiple genes.
B) Psychological traits are usually determined by a single gene pair, whereas physical traits are usually determined by multiple genes.
C) Both physical and psychological traits are usually determined by multiple genes.
D) Both physical and psychological traits are usually determined by a single gene.