9781422280324

Words to Understand

atypical: different from the usual. chromosome: a double helix made of DNA; it contains genes. compelled: forced or pressured to do something. continuum: a collection of values or qualities that change a little bit from one to the next, but a lot from one end to the other. disability: a condition that restricts a person’s ability to do essential activities. impair: damage, injure, or make worse. prevalence: how common or uncommon a condition is in a population. spectrum: a way of classifying information or things along a continuum. tic: an involuntary repeated behavior or movement of muscles.

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