Final answer:
Continuous cell cultures have disadvantages such as limited growth, expense, and potential genetic differences from the original source animal.
Step-by-step explanation:
Continuous cell cultures have several disadvantages:
- Virus infectivity: In continuous cell cultures, viruses do not reliably infect them, which can limit their use for viral studies.
- Limited growth: Continuous cell cultures only grow for a limited number of generations, after which their growth ceases due to lack of proper culture media or built-in senescence mechanism.
- Expense: The expense of preparation for continuous cell cultures can be high because it requires specific equipment and media.
- Genetic differences: Continuous cell cultures may be significantly different genetically from the original source animal, which can affect the validity of research conducted using these cultures.