What is the main disadvantage of asexual reproduction?

The main disadvantage of asexual reproduction is that it reduces genetic diversity. In asexual reproduction, organisms reproduce by creating genetically identical offspring, which means that the genetic variation within a population is minimal. This homogeneity can make the population more vulnerable to diseases and environmental changes. When all individuals are genetically similar, if a disease or environmental change negatively affects one individual, it is likely to affect others in the population as well.

In contrast, sexual reproduction introduces genetic variation, which can provide a greater chance for some offspring to possess traits that may better suit them for survival in changing environments. This increased genetic diversity is crucial for the long-term resilience and adaptability of a species.