Research on the Role of Heredity in Temperament Indicates That

question 56

Multiple Choice

Research on the role of heredity in temperament indicates that

• A) heritability estimates derived from twin studies suggest a major role for genetic factors in temperament and personality.
• B) identical twins are more similar than fraternal twins across a wide range of temperamental traits and personality measures.
• C) only 5 to 10 percent of individual differences in temperament have been attributed to differences in genetic makeup.
• D) heritability estimates are much higher for expressions of positive emotion than for negative emotion.

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Definitions:

C Horizon

The layer of soil that consists of weathered rock and little organic material, often serving as the foundation of the soil profile.

A Horizon

The top layer of soil, known as topsoil, where organic matter decays and nutrients are readily available for plants.

Casparian Strip

The Casparian strip is a barrier made of a band of cell wall material found in the roots of plants, blocking the passive flow of water and solutes into the xylem by way of cell walls.

Endodermal Cells

Cells forming the innermost layer of the three primary cell layers in early embryonic development, which develop into the lining of the gut and associated structures.