noun. 1  Linguistics A predictable phonetic variant of a phoneme. 2  For example, the aspirated t of top, the unaspirated t of stop, and the tt (pronounced as a flap) of batter are allophones of the English phoneme &sol;t&sol;. 3  or Allophone Canadian A person whose native language is other than French or English.
What is genetic testing? Genetic testing is a type of medical test that identifies changes in chromosomes, genes, or proteins. The results of a genetic test can confirm or rule out a suspected genetic condition or help determine a personâs chance of developing or passing on a genetic disorder. More than 1,000 genetic tests are currently in use, and more are being developed. Several methods can be used for genetic testing: Molecular genetic tests (or gene tests) study single genes or short lengths of DNA to identify variations or mutations that lead to a genetic disorder.
Genetic testing and genetic engineering are not related. Genetic testing is looking at the chromosomal constitution of an individual and determining if they have a genetic dis â¦ order. Genetic engineering on the other hand, is a much larger avenue and is almost a science in itself. This area of molecular biology deals with inserting foreign genes into organisms in order to increase yield or produce novel products.   Genetic testing is useful to test if an unborn fetus has any genetic diseases.