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a series of three or more alternative or allelic forms of a gene, only two of which can exist in any normal, diploid individual.
A disease or condition caused by an absent or defective gene or by a chromosomal aberration
The process of selecting a few organisms with desired traits to serve as parents of the next generation
(genetics) the act of mixing different species or varieties of animals or plants and thus to produce hybrids
a group of genetically identical cells or organisms derived from a single cell or individual by some kind of asexual reproduction
The insertion of working copies of a gene into the cells of a person with a genetic disorder in an attempt to correct the disorder
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