**Core Concept**
The question is testing the understanding of the relationship between genetic and environmental factors in the development of malocclusion. Malocclusion is a complex trait influenced by both genetic and environmental factors, such as dental arch size, tooth morphology, and jaw alignment. In a homogenous population, the genetic factors contributing to malocclusion are more likely to be uniform, whereas in a heterogenous population, the genetic diversity can lead to a wide range of malocclusion types.

**Why the Correct Answer is Right**
In a homogenous population, the incidence of malocclusion is generally higher due to the uniform genetic factors contributing to the development of malocclusion. This is because the genetic predisposition to malocclusion is more pronounced in a population with a similar genetic makeup. The uniform genetic factors can lead to a higher prevalence of specific types of malocclusion, such as Class II or Class III malocclusion. In contrast, a heterogenous population has a lower incidence of malocclusion due to the diverse genetic factors that can counterbalance each other.

**Why Each Wrong Option is Incorrect**
**Option B:** This option is incorrect because a heterogenous population actually has a lower incidence of malocclusion, not a higher one.
**Option C:** This option is incorrect because the incidence of malocclusion is not directly related to the population's socioeconomic status.

**Clinical Pearl / High-Yield Fact**
It's essential to remember that malocclusion is a complex trait influenced by both genetic and environmental factors. In a clinical setting, it's crucial to assess both the patient's genetic history and environmental factors, such as diet and oral habits, to develop an effective treatment plan.

**Correct Answer:** A.