Down Syndrome, Caused by an Extra Copy of Which Chromosome

question 96

Multiple Choice

Down syndrome, caused by an extra copy of which chromosome, is the best known chromosomal abnormality largely because its effects are less lethal than those of other chromosomal defects and most affected infants survive?

• A) Chromosome 4
• B) Chromosome 9
• C) Chromosome 17
• D) Chromosome 21

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Definitions:

Context-Dependent Memory

The theory that information learned in a particular situation or place is better recalled when the context at the time of memory retrieval matches the original learning environment.

Memory Consolidation

The process by which short-term memories are transformed into long-term memories.

Long-Term Potentiation

An enduring increase in signal transmission between two neurons that results from stimulating them synchronously, believed to be a cellular mechanism for learning and memory.

Classically Conditioned Associations

Refers to the learning process that occurs when two stimuli are repeatedly paired together; a response that is at first elicited by the second stimulus is eventually elicited by the first stimulus alone.