<P> Genetic testing identifies changes in chromosomes , genes , or proteins . The variety of genetic tests has expanded throughout the years . In the past , the main genetic tests searched for abnormal chromosome numbers and mutations that lead to rare , inherited disorders . Today , tests involve analyzing multiple genes to determine the risk of developing specific diseases or disorders , with the more common diseases consisting of heart disease and cancer . The results of a genetic test can confirm or rule out a suspected genetic condition or help determine a person 's chance of developing or passing on a genetic disorder . Several hundred genetic tests are currently in use , and more are being developed . </P>
<P> Genetic testing identifies changes in chromosomes , genes , or proteins . The variety of genetic tests has expanded throughout the years . In the past , the main genetic tests searched for abnormal chromosome numbers and mutations that lead to rare , inherited disorders . Today , tests involve analyzing multiple genes to determine the risk of developing specific diseases or disorders , with the more common diseases consisting of heart disease and cancer . The results of a genetic test can confirm or rule out a suspected genetic condition or help determine a person 's chance of developing or passing on a genetic disorder . Several hundred genetic tests are currently in use , and more are being developed . </P>
what might a scientist examine to determine whether a person is a carrier for a genetic disorder
what might a scientist examine to determine whether a person is a carrier for a genetic disorder
chromosomes genes proteins
chromosomes genes proteins