drk1980
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A child is found to have mental retardation, a flat facies, prominent epicanthal folds, and a simian crease. He is found to have an endocardial cushion defect and at the age of 30 develops Alzheimer's disease. What genetic malformation most likely caused this syndrome?
1. Mitotic nondisjunction of sister chromatids
2. Meiotic nondisjunction of sister chromatids
3. Mitotic nondisjunction of homologous chromosomes
4. Meiotic nondisjunction of homologous chromosomes
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| robin082006
Forum Hero
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4, sorry, I read wrongly
hope not make this mistake anymore
Edited by robin082006 on 01/21/06 - 10:18 PM
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| sturge_weber
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4.
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| reet
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4
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| jonathon
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4. Down syndrome. Non- dysjunction of homologous chromosomes.
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