Infants Begin to Use Gestures Such as Showing and Pointing

question 14

Multiple Choice

Infants begin to use gestures such as showing and pointing at about:

• A) 2 to 4 weeks of age.
• B) 2 to 3 months of age.
• C) 5 to 7 months of age.
• D) 8 to 12 months of age.

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Definitions:

Dominant Trait

A genetic trait expressed in an individual's phenotype, even when only one copy of the gene responsible for the trait is present.

Vestigial Wings

Remnant wings in some organisms that have lost their primary function through evolution.

Dihybrid Cross

A breeding experiment between P generation (parental generation) organisms differing in two traits, used to determine the inheritance patterns of genes.

Mendel's Model

The set of foundational principles for genetics derived from the work of Gregor Mendel, describing how traits are inherited through dominant and recessive genes.