Fecundity
Potential fertility or, the capability of repeated fertilization; specifically refers to the quantity of gametes produced per individual over a period of time.

Fermentation
A series of reactions occurring under anaerobic conditions (lacking oxygen) in certain microorganisms (particularly yeasts) in which organic compounds such as glucose are converted into simpler substances with e release of energy. Fermentation is involved in bread making where the carbon dioxide produced by the yeast causes dough to rise

Finished DNA Sequence
High-quality, low error, gap-free DNA sequence of the human genome. Achieving this ultimate 2003 HGP goal requires additional sequencing to close gaps, reduce ambiguities, and allow for only a single error every 10,000 bases, the agreed­ upon  standard for HGP finished sequence. See also: sequencing, draft sequence.

Filial generation (FI, F2)
Each generation of offspring in a breeding program, designated F1, F2, etc.

Fingerprinting
In genetics, the identification of multiple specific alleles on a person's DNA to produce a unique identifier for that person. See also: forensics

Fixation
A gene has achieved fixation when its frequency has reached 100 percent in the population.
2. The status of a locus in which all members of a population are homozygous; the frequency of the fixed allele is 1.0.

Fixed
(1) In population genetics, a gene is "fixed" when it has a frequency of 100 percent. (2) In creationism, species are described as "fixed" in the sense that they are believed not to change their form, or appearance, through time