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ABGC Board Exam (Genetic Counseling) Q&A Latest

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ABGC

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ABGC Board Exam (Genetic Counseling) Q&A Latest

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ABGC Board Exam (Genetic Counseling) Q&A Latest ABGC Board Exam (Genetic Counseling) Q&A Latest

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Uploaded on: May 12, 2025
Last updated: May 12, 2025
Number of pages: 7
Written in: 2025/2026
Type: Exam (elaborations)
Contains: Questions & Answers
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ABGC Board Exam (Genetic Counseling) | Q&A Latest Update 2025/2026 | 100% PASS Osteogenesis imperfecta - Answer -Genes: COL1A1 (ch17; more severe pheno w/mutn b/c there are 2 alpha strands vs. 1 beta strand), COL1A2 (ch7), form protein triple helix Type I -- AD, mild, blue sclera, brittle bones, no deformity collagen: normal quality, AMOUNT is reduced Type II: AD, neonatal lethal, abnormal collagen Type III: AD, progressive deforming, fractures at birth, small, blue sclera Type IV: AD, normal sclera, mild/mod bone deformity, short stature, fractures Alzheimer disease - Answer -Usually complex inheritance, FDR risk 38% over lifetime APOe4 allele confers risk, modifier of monogenic AD genes (causes earlier onset). APOe2 allele is protective for AD. AD genes: APP, PSEN1 (50% of AD cases), PSEN2 Pleiotropy - Answer -one gene causes more than one disease. many examples, but APOe is one -- hypercholesterolemia and Alz D Large deletions in mtDNA - Answer -Usually NOT maternally-inherited