## **Core Concept**
The question describes a pattern of inheritance that suggests a specific type of genetic transmission. The key details provided are the multi-generational involvement, gender-specific transmission patterns, and the fact that only females seem to pass on the condition to their offspring.

## **Why the Correct Answer is Right**
The pattern described fits with **Mitochondrial Inheritance**. This type of inheritance involves conditions caused by mutations in the mitochondrial DNA. Mitochondrial DNA is inherited solely from one's mother, as only egg cells contribute mitochondria to the zygote. The condition affects both males and females, but only females can pass it on to their children. This matches the scenario provided: all children of affected females are affected, but none of the children of affected males are. This pattern is seen because males have one X and one Y chromosome (XY) and thus pass their Y chromosome to sons and their X chromosome to daughters, while females have two X chromosomes (XX) and can pass either to their offspring. Since mitochondrial DNA comes from the mother, the gender-specific transmission pattern observed is a hallmark of mitochondrial inheritance.

## **Why Each Wrong Option is Incorrect**
- **Option A:** This option would represent an **Autosomal Dominant** pattern. In autosomal dominant inheritance, each child has a 50% chance of inheriting the mutated gene, regardless of gender. This does not match the described pattern where all children of affected females are affected, and no children of affected males are.
- **Option B:** This would represent an **Autosomal Recessive** pattern. Here, a person needs to inherit two copies of the mutated gene (one from each parent) to be affected. This does not fit the scenario described.
- **Option C:** This option represents **X-linked Dominant** inheritance. While this pattern does show a gender bias in transmission (affected males pass the condition to all their daughters but none of their sons), it doesn't perfectly match because the condition described seems to follow a maternal lineage without exception.

## **Clinical Pearl / High-Yield Fact**
A key point to remember is that **mitochondrial diseases** can present with a wide range of symptoms, often affecting high-energy-demanding organs like the nervous system and muscles. Because only egg cells contribute mitochondria to the fertilized egg, **mitochondrial DNA diseases are maternally inherited**. This pattern helps in diagnosing and predicting the inheritance of certain neurological and muscular disorders.

## **Correct Answer:** .