There is no correlation between genome size and complexity of an organism.

Question

Quizplus · Accepted Answer

Genome size varies greatly between different species and does not indicate their level of complexity. For example, the genome size of an amoeba is much larger than that of a human, but humans are far more complex in terms of physiology and behavior. Additionally, some organisms have evolved ways to accomplish complex tasks with relatively small genomes through gene regulation and alternative splicing, further demonstrating that genome size is not necessarily indicative of complexity.

There Is No Correlation Between Genome Size and Complexity of an Organism