Gene

In biology, the smallest unit of hereditary information passed from parent to child. First identified in the 18th century by Gregor Johann Mendel, they would later be discovered to be composed of the four DNA nucleobases. Genes are passed on through DNA replication.

Army's Heaven
Big Boss
CQC Enhancer
Cunningham
Elisa
Exon
FOX Unit
FOXDIE
Gene (FOX Unit)
Gene Therapy
Genome Soldier
Ghost
Human Genome
ICBMG
Infinity Bowie Knife
Intron
Jonathan (San Hieronymo Peninsula ex-Soviet Soldier)
Liquid Ocelot (MGS4)
Meme
Mutated FOXDIE (MGS4)
Precog
Retrovirus
San Hieronymo Incident
San Hieronymo Peninsula
Sense
Shadow Moses Incident
Skowronski
Soldier Genes
Solid Snake
Successor Project
Terminator Gene (MGS4)
Ural Nuclear Disaster
Ursula
Wharf Roach
Zero
Zero Shift