Which inheritance pattern is characteristic of Orofaciodigital Syndrome?

Prepare for the American Board of Genetic Counseling Test. Engage with flashcards and multiple choice questions, each question comes with hints and explanations to enhance your knowledge. Get exam ready!

Orofaciodigital Syndrome is primarily associated with an X-linked dominant inheritance pattern. This means that the gene mutation responsible for the syndrome is located on the X chromosome, and it affects both males and females, although males are typically more severely affected. In X-linked dominant disorders, an affected male will pass the trait to all of his daughters but none of his sons, while an affected female has a 50% chance of passing the mutation to each child, regardless of their sex.

The characteristic features of Orofaciodigital Syndrome include abnormalities of the face, oral cavity, and digits, and its inheritance pattern is significant in genetic counseling as it affects familial risk assessments and implications for affected families. Understanding this inheritance pattern helps genetics professionals provide crucial information regarding recurrence risks and the implications for family planning for those involved.

The other inheritance patterns listed are not consistent with the characteristics of Orofaciodigital Syndrome. For example, autosomal dominant disorders would present differently in terms of male-to-male transmission and risks passed to offspring, and autosomal recessive conditions require two copies of the mutated gene for manifestation, which does not apply in this syndrome. Y-linked inheritance affects traits only in males and is not relevant in the context of Orofaciodigital Syndrome

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