Question

How is it possible that only 1.5% of the human genome can code for gene products, but humans can be so complex in their physiology?

Answer 1

Because of alternative splicing there are many outcomes causing human psychology to be more complex.

Step-by-step explanation:

Alternative splicing of RNA is a crucial process for changing the genomic instructions into functional proteins. It plays a critical role in the regulation of gene expression and protein diversity in a variety of Eukaryotas. In humans, approximately 95% of multi-exon genes undergo alternative splicing.