Psychology 102 Chapter 4.1

Molecular behavior genetics is the study of:

• environmental influences on gene expression that occur without a DNA change

• the subfield of biology that studies the molecular structure and function of genes

• how the structure and function of genes interact with our environment to influence actions

• the proportion of variation among individuals that we can attribute to genes

Environmental factors such as diet, drugs, or stress can alter gene expression by affecting:

• neurogenesis

• lateralization

• epigenetic molecules

• natural selection

Our ability to react to the environment demonstrates our:

• tomography

• heritability

• epigenetic molecules

• adaptive capacity

The characteristic emotional reactivity and intensity of individuals can be described as their ________.

• temperament

• heritability

• personality traits

• attitudes

Your 3-year-old niece has just started in preschool, and her teachers are reporting that she is extremely emotionally reactive and impulsive. What do you think she will be like as a young adult?

• Research findings suggest she will be somewhat conflict-prone

• Research findings suggest that she will mellow and become socially adept

• Research findings suggest that the connection between early temperament and adult personality is only evident in males

• Research findings do not indicate any connection between early temperament and adult personality

Timmy and Tammy are identical twins. They were separated at birth and raised in different families. They will most likely have similar:

• moral values

• religious beliefs

• personality traits

• political attitudes

______ influences on personality are most clearly highlighted by comparing identical twins raised together with identical twins raised apart.

• Genetic

• Environmental

• Both genetic and environmental

• Neither genetic nor environmental

Mark and Mike are twins who developed from a single fertilized egg. They are:

• opposite sex identical twins

• opposite sex fraternal twins

• same sex identical twins

• same sex fraternal twins

______ develop from a single fertilized egg, whereas ______ develop from separate fertilized eggs

• Identical twins; fraternal twins

• Fraternal twins; identical twins

• Maternal twins; paternal twins

• Fraternal twins; genetic twins

_____ are the biochemical units of heredity that make up chromosomes.

• Genes

• Dendrites

• Epigenetic molecules

• Neurotransmitters