Three-Year-Olds Artie and Kurt Had Identical Boxes of Raisins at Snack

question 90

Multiple Choice

Three-year-olds Artie and Kurt had identical boxes of raisins at snack time. When Kurt poured his raisins out onto the table, Artie was sure that Kurt had more raisins. This demonstrates that Artie lacks

• A) conservation.
• B) animistic thinking.
• C) hierarchical classification.
• D) dual representation.

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Definitions:

Linkage Group

A set of genes located close together on the same chromosome that tend to be inherited together.

Chromosome

A chromosome is a long, continuous thread of DNA that contains numerous genes and regulatory elements, housed within the nucleus of every cell.

Testcross

Method of determining the genotype of an individual with a dominant phenotype: a cross between the individual and another individual known to be homozygous recessive.

Homozygous Dominant

An individual having two identical alleles for a trait on both homologous chromosomes, with both alleles being dominant.