If a 2-Year-Old Child Uses the Word Car in a Situation

question 54

Multiple Choice

If a 2-year-old child uses the word car in a situation where her dad is washing the car,again when she is sitting in the car,and yet again when she is looking out the window,each time with different inflection,what does research indicate that this toddler is probably doing?

• A) expressing three different messages about the car
• B) simply practising use of the new label that she has learned
• C) overextending the use of the word car
• D) underextending the use of the word car

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Definitions:

Genomic Imprinting

A genetic phenomenon by which certain genes are expressed in a parent-of-origin-specific manner.

Incomplete Dominance

A genetic phenomenon in which the phenotype of the heterozygote is intermediate between both homozygotes, neither allele being completely dominant over the other.

Preconception Sperm Sorting

A technique used before conception to separate sperm cells to favor the selection of a specific gender during fertilization.

Pre-Implantation Genetic Diagnosis

A technique used to identify genetic defects within embryos created through in vitro fertilization (IVF) before pregnancy.