## Core Concept
Von Willebrand disease (VWD) is a genetic disorder caused by a deficiency or dysfunction of von Willebrand factor (VWF), a crucial protein involved in blood clotting. The inheritance pattern of VWD is primarily determined by the genetic mutations affecting the VWF gene. VWF is located on chromosome 12 and is inherited in an autosomal pattern.

## Why the Correct Answer is Right
The correct answer, autosomal dominant, is right because most cases of von Willebrand disease, particularly type 1, are inherited in an autosomal dominant manner. This means a mutation in one of the two copies of the VWF gene is sufficient to cause the condition. However, the severity and expression can vary widely among affected individuals, even within the same family. The autosomal dominant pattern explains why a single inherited mutated copy of the gene can lead to the manifestation of the disease.

## Why Each Wrong Option is Incorrect
- **Option A:** X-linked recessive inheritance is incorrect because von Willebrand disease is not linked to the X chromosome; it is located on chromosome 12, which follows an autosomal pattern of inheritance.
- **Option B:** Autosomal recessive inheritance is incorrect for most cases of VWD, particularly type 1, which is the most common form and follows an autosomal dominant pattern. However, some rare types of VWD may exhibit autosomal recessive inheritance.
- **Option D:** Mitochondrial inheritance is incorrect because mitochondrial diseases are inherited solely from mothers through mitochondrial DNA, and von Willebrand disease is related to a gene on chromosome 12, not mitochondrial DNA.

## Clinical Pearl / High-Yield Fact
A key clinical pearl is that von Willebrand disease is the most common inherited bleeding disorder and can affect both males and females equally. Given its autosomal dominant inheritance pattern, a thorough family history is crucial in diagnosing and managing the condition. Additionally, it's worth noting that while type 1 VWD is often autosomal dominant, types 2 and 3 have more complex inheritance patterns and are less common.

**Correct Answer: C. Autosomal dominant**