Jacob-Monod Hypothesis
See Operon Model.
Jaundice
A phenotypical expression caused by the presence of bilirubin, which results in the yellowing of eyes and skin. This can be a result of excess destruction of red blood cells.
Java Man
A common name given to home erectus, an ancestor of man.
Jaw
The mandible bone of animals, that provides the muscle power for the crushing action used in teeth to break down foodstuffs.
Joint
The area of contact between two bones. There are many different types of joint including hinge, ball and socket, universal, sliding and slightly movable.
Joule
A unit of energy.
Jugular
Pertaining to the throat or neck.
Junk DNA
DNA that seems to have no apparent function and is therefore obsolete in its current genome.