What is a disadvantage of having genetic diversity in a species?

Genetic diversity within a species typically enhances its overall resilience and adaptability, allowing populations to better respond to environmental changes and disease pressures. However, one potential downside of having increased genetic diversity is the potential for more variation in the species' susceptibility to certain diseases. This can create a scenario where new pathogens may find a suitable host among the diverse genetic backgrounds.

While genetic diversity can lead to a robust immune response across a population, it can also mean that some individuals carry genetic traits that make them more susceptible to specific diseases. Consequently, this aspect of genetic diversity can pose an increased risk of disease spreading more readily through diverse populations, especially if pathogens adapt quickly and encounter hosts with varied immune responses. This nuance highlights that while diversity bolsters some aspects of survival and adaptability, it can also introduce complexities regarding disease dynamics.