Final answer:
The genome size is modified throughout evolution due to factors like duplication events, genetic mutations, and natural selection. These factors can increase or decrease the size of the genome over time.
Step-by-step explanation:
The genome size is modified throughout evolution due to various factors such as duplication of genetic material, genetic mutations, and natural selection.
One way genome size can be modified is through duplication events, where segments of the genome are replicated.
Over time, these duplicated segments can accumulate mutations and acquire new functions, resulting in an increase in genome size.
Additionally, genetic mutations, such as insertions or deletions of DNA, can also modify the size of the genome. Furthermore, natural selection can play a role in genome size modification by favoring certain genetic variations that provide a fitness advantage.