Comparisons Between the Correlations of Intelligence Scores in Identical and Fraternal

question 133

Multiple Choice

Comparisons between the correlations of intelligence scores in identical and fraternal twins are often regarded as evidence for the role of genetic factors in the development of intelligence. This argument is based on the assumption that __________.

• A) siblings have shared genes and shared environments
• B) identical twins have the same phenotype
• C) fraternal twins have the same genotype and different phenotypes
• D) the environments of identical twins are no more similar than those of fraternal twins

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Definitions:

Soluble

The ability of a substance to be dissolved in a solvent, forming a homogeneous mixture at the molecular or ionic level.

Ethers

A class of organic compounds characterized by an oxygen atom connected to two alkyl or aryl groups, widely used as solvents and in the production of pharmaceuticals and chemicals.

Boiling Point

The boiling point is the temperature at which a substance transitions from a liquid to a gas (vaporizes) at a given pressure, distinctive for each substance.

Molecular Weight

The sum of the atomic weights of all atoms in a molecule, indicating the size of the molecule.