Licensed Educational Psychologist (LEP) Practice Exam 2025 – Comprehensive All-in-One Guide to Exam Success!

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What aspect of Down Syndrome distinguishes it from other conditions?

It is solely caused by environmental factors

It results from an extra chromosome

Down syndrome is primarily distinguished from other conditions by the fact that it results from an extra chromosome, specifically an additional copy of chromosome 21, which leads to a total of three copies instead of the typical two. This genetic anomaly, known as trisomy 21, is the primary characteristic that defines Down syndrome and underpins the various physical and cognitive features associated with the condition.

This distinction is significant as it highlights the biological basis of Down syndrome, differentiating it from conditions that may have environmental or lifestyle origins. Additionally, it reinforces the understanding that Down syndrome is not confined to specific ethnic groups, nor is it a temporary or reversible condition; rather, it involves lifelong implications for individuals affected by it.

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It affects only certain ethnic groups

It is a temporary condition

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