The mutant alleles screened by the test vary according to a person's ethnic group or by the occurrence of CF already in the family. More than 10 million Americans, including one in 25 white Americans, are carriers of one mutant allele of the CF gene. CF is present in other races, though not as frequently as in white individuals. About one in 46 Hispanic Americans, one in 65 African Americans, and one in 90 Asian Americans carry a mutation of the CF gene.
The mutant alleles screened by the test vary according to a person's ethnic group or by the occur,rence of CF already in the family. More than 10 million Americans, including one in 25 white Americans are carriers of one mutant allele of the CF gene. CF is present in other races, though not as frequently as in white in,dividuals. About one in 46 Hispanic Americans, one in 65 African Americans and one in 90 Asian Americans carry a mutation of the CF gene.