In biology lab,your class counts the number of people with different colors of hair and eyes.Your instructor says that these traits are variable and difficult to trace in each family.The reason is that these two traits depend on more than one gene,and are called

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The traits of hair and eye color depend on more than one gene, which makes them polygenic traits. This makes them difficult to trace in a family and variable, since multiple genes are involved in determining the final phenotype. Codominant and incomplete dominant traits refer to the expression of a single gene, and pleiotropic traits refer to a single gene affecting multiple traits. Recessive traits involve the expression of two copies of a gene.

In Biology Lab,your Class Counts the Number of People with Different