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forward genetics

Forward genetics is a classical genetic approach where one starts with a mutation phenotype and works toward identifying the mutated gene. Forward genetics is a molecular genetics approach to determining the genetic basis responsible for a phenotype. Forward genetics methods begin with identifying a phenotype and finding or creating model organisms that display the characteristic being studied.

Forward genetics is a powerful approach to elucidate critical biological phenomena that cannot be predicted from the function of known genes.

Forward genetics or phenotype-based screens involve mutagenesis using chemicals or irradiation to induce DNA lesions at random, followed by phenotypic characterization of the progeny of mutagenized mice to identify anomalies potentially caused by these induced lesions. In contrast to gene-driven approaches such as targeted mutagenesis, forward genetic screens are phenotype-driven and do not depend on any a priori assumption regarding underlying molecular mechanisms.

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