Dr. Chu studies the environmental influences on gene expression by studying identical twins that have been reared apart. Dr. Chu's field of study is called:

• psychology

• evolutionary psychology

• epigenetics

• genetics

Brenda and her brother, Brook, developed from separate fertilized eggs. They are _____ twins.

• oppposite-sex fraternal

• same-sex identical

• same-sex fraternal

• opposite-sex identical

The prevalence of genetically predisposed traits that have a reproductive advantage is BEST explained in terms of:

• epigenetics

• natural selection

• behavior genetics

• the human genome

1. In extreme cases, split-brain operations are used to treat:

• meningitis

• schizophrenic

• depression

• epilepsy

The two hemispheres that make up 85 percent of the brain's weight are collectively known as the:

• reticular formation

• cerebral cortex

• cerebrum

• cerebellum

Which statement is true?

• Most human traits are influenced by a single gene.

• Most behavioral differences among humans are caused by experience.

• Most behavioral similarities among humans are caused by experience.

• Most human traits are influenced by groups of genes

Rather than acting as blueprints that lead to the same result no matter the context, genes react to the environment. This demonstrates that genes are:

• determined by our environment

• self-regulating

• determined by our behavior

• fixed and unchangeable

Adopted children are especially likely to have similar _____ if raised in the same home.

• religious beliefs

• genomes

• personality traits

• behavioral tendencies

Research with split-brain patients suggests that the _____ typically constructs the theories people offer to explain their own behaviors.

• right cerebral hemisphere

• left cerebral hemisphere

• somatic nervous system

• autonomic nervous system

In 1870, Gustav Fritsch and Eduard Hitzig discovered the _____ after doing research on the brains of dogs.

• amygdala

• reward centers

• reticular formation

• motor cortex