True statement regarding autosomal dominant disorder –
**Core Concept**
Autosomal dominant disorders are a category of genetic disorders that occur when a single copy of the dominant allele is enough to cause the condition. These disorders can be inherited from either parent and have a 50% chance of being passed on to offspring. The underlying principle involves the expression of a dominant allele.
**Why the Correct Answer is Right**
Since the correct answer choice is missing, let's discuss the general principle: in autosomal dominant disorders, the presence of one mutated copy of the gene is sufficient to cause the disease. This is because the mutated gene dominates over the normal gene, leading to the expression of the disease phenotype.
**Why Each Wrong Option is Incorrect**
**Option A:** Without the specific text of option A, we cannot provide a detailed explanation of why it is incorrect.
**Option B:** Similarly, without option B's text, its incorrectness cannot be addressed.
**Option C:** The same applies to option C.
**Option D:** And option D.
**Clinical Pearl / High-Yield Fact**
A key point to remember about autosomal dominant disorders is that they typically appear in every generation of an affected family, and both males and females have an equal chance of inheriting and passing on the condition.
**Correct Answer:** Correct Answer: D. Each child has a 50% chance of inheriting the disorder.