Gene pool
The total aggregate of genes in a population at any one time.
Genetic code
The system of nucleotide triplets in DNA and RNA that carries genetic information; referred
to as a code because it determines the amino acid sequence in the enzymes and other
protein molecules synthesized by the organism.
Genetic drift
Changes in the gene pool of a small population due to chance.
Genetic information
The total accumulation of known genetic data on all organisms. The term may also be
applied to individuals or families, i.e., the total known genetic data for a given person or
family group.
Genetic isolation
The absence of genetic exchange between populations or species as a result of geographic
separation or of premating or postmating mechanisms (behavioral, anatomical, or
physiological) that prevent reproduction.
Genetic map
An ordered list of genetic loci (genes or other genetic markers) along a chromosome.
Genetic recombination
The general term for the production of offspring that combine traits of the two parents.
Ganoid
Primitive fishes having thick bony scales with a shiny covering
Genome
The complete complement of an organism's genes; an organism's genetic material.
Genomic imprinting
The parental effect on gene expression. Identical alleles may have different effects on
offspring, depending on whether they arrive in the zygote via the ovum or via the sperm.
Genomic library
A set of thousands of DNA segments from a genome, each carried by a plasmid, phage, or
other cloning vector.
Gene mutations
A mutation due to an intramolecular reorganization of a gene.
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