Exam 3: Seciton 4: Beginnings: Heredity and Environment

An individual's phenotype is dependent entirely on an individual's genes.

When a person inherits a recessive gene that is not expressed in the phenotype, that person is a carrier of the gene.

It is the mother's ovum that determines whether the developing baby will become a boy or a girl.

Consultation and testing by trained experts that enable individuals to learn about their genetic heritage, including harmful conditions they might pass along to any children they may conceive, is referred to as couples counseling.

Heritability indicates how much of the variation of a trait can be traced to genes.

Almost every trait is polygenic, which means it is affected by many genes.