Homo sapiens estimated genome size 3.2 billion base pairs, which encodes for about 20,000 genes: https://en.wikipedia.org/wiki/Genome#Genome_size https://en.wi

Homo sapiens estimated genome size 3.2 billion base pairs, which encodes for about 20,000 genes: https://en.wikipedia.org/wiki/Genome#Genome_size https://en.wikipedia.org/wiki/Genome#Genome_size We (mammals) rank high in genes, but not base pairs. The zebrafish has about 26,000 genes "the largest gene set of any vertebrate so far sequenced." https://www.nature.com/articles/nature12111 https://www.nature.com/articles/nature12111 Obviously size is not necessarily proportional to complexity. Also, the longer the sequence the more mutations: https://en.wikipedia.org/wiki/Genome_size#Drake's_rule https://en.wikipedia.org/wiki/Genome_size#Drake's_rule