The code of life, written in four letters.
Your genotype is your DNA sequence—the code. Your phenotype is the observable result—what you look like.
The highlighted sequences represent genes that code for visible traits. Most of your DNA is "junk"—the dim letters between highlights.
Only about 1-2% of your DNA actually codes for proteins. The rest was once called "junk DNA" but likely serves regulatory functions.
A single trait like height is influenced by thousands of genes scattered across your chromosomes.
A Adenine · T Thymine
G Guanine · C Cytosine