Which of the following is a disadvantage of maintaining genetic identity in asexual reproduction?

Maintaining genetic identity in asexual reproduction leads to a higher likelihood of extinction because asexual reproduction produces genetically identical offspring, reducing genetic diversity within a population. This lack of genetic variation limits the ability of the species to adapt to changing environmental conditions or new pathogens.

When a population lacks diversity, if a disease or environmental change occurs that the current genetic makeup cannot withstand, it can lead to a rapid decline in numbers. Essentially, the population becomes more vulnerable because all individuals share the same genetic traits, which may not be suitable for survival under stress. This phenomenon is often referred to as the "cost of asexuality," illustrating how reliance on a single genomic template can hinder long-term survival compared to sexually reproducing populations that benefit from mixing genes and enhancing resilience.

In contrast, the other options suggest advantages of maintaining genetic identity, such as increased growth rates, adaptation ease, and competitive success, which do not apply to the context of decreased variation leading to extinction risk in asexual populations.