Final answer:
The age of processed pseudogenes can be estimated by the number of mutations they have accumulated. Older processed pseudogenes are expected to have more mutations compared to younger ones.
Step-by-step explanation:
The age of processed pseudogenes can be estimated by the number of mutations they have accumulated. Pseudogenes are non-functional copies of genes that have accumulated mutations over time.
Since mutations occur randomly, the more mutations a pseudogene has, the longer it has been accumulating mutations and the older it is. Therefore, we expect to find that the older processed pseudogenes have accumulated more mutations compared to younger ones.