**Core Concept**
The pedigree chart depicts an autosomal dominant pattern of inheritance, where a single copy of the mutated gene is sufficient to cause the disease. This is characterized by an affected parent and affected offspring, along with a pattern of inheritance that skips generations.

**Why the Correct Answer is Right**
The presence of an affected parent and the autosomal dominant pattern of inheritance suggest a disorder caused by a dominant mutation. The most common cause of autosomal dominant disorders is a point mutation in a single gene, which leads to the production of a dysfunctional protein. In this scenario, the disease is likely caused by a dominant mutation in a gene that codes for a protein involved in a critical cellular process.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because the pedigree chart does not show a clear pattern of X-linked inheritance, which would typically involve affected males and carrier females.

**Option B:** This option is incorrect because the pedigree chart does not show a clear pattern of recessive inheritance, which would typically involve affected individuals who are homozygous recessive.

**Option C:** This option is incorrect because the pedigree chart does not show a clear pattern of mitochondrial inheritance, which would typically involve affected individuals who are maternally related.

**Clinical Pearl / High-Yield Fact**
Remember that autosomal dominant disorders often have a high penetrance, meaning that most individuals with the mutation will express the disease.

**Correct Answer: C. Huntington's disease.**