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When describing Down syndrome, it's important to note that __________. A. it can be classified as a single-gene disorder B. it is caused when red blood cells cannot properly form
hemoglobin C. it causes infected males to have low testosterone levels D. it is usually caused by three copies of chromosome 21
The answer is A. It can be classified as a single-gene disorder.
Expert answered|teague10|Points 0|
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Asked 10/29/2013 11:02:05 PM
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