Dizygotic Twins Resemble Each Other in IQ Scores More Strongly

question 207

Multiple Choice

Dizygotic twins resemble each other in IQ scores more strongly than single-birth brothers or sisters do.What conclusion does that result support?

• A)Sharing an environment makes people more similar in IQ.
• B)Recessive genes influence the development of IQ.
• C)Dominant genes influence the development of IQ.
• D)The heritability of IQ increases as people grow older.

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Definitions:

Experimental Research

A research design that permits inferences about cause and effect by exerting control, systematically manipulating a variable, and studying the effects on measured variables.

Control Group

In experimental research, the group of participants that does not receive the experimental treatment, used for comparison purposes.

Random Assignment

A method of assigning participants that ensures each participant has an equal chance of being assigned to the experimental group or control group.

Experimental Group

The group in an experimental study that receives the treatment or intervention being tested.