Back to Top. The operator gene controls the functioning of a specific series of structural genes. It lies adjacent to the structural genes which it controls. The cistrons are expressed when the operator gene is turned on by an inducer, and are not expressed when the operator gene is turned off by a repressor.
Included in the multiracial category is the Democratic presumptive nominee, Sen. Barack Obama. With a white mother from Kansas and a black father from Kenya, Obama is the nation's first biracial candidate for president.The media, however, have continually called Obama the nation's first major party black candidate, saying he could make history as the first black president..ith a white mother from Kansas and a black father from Kenya, Obama is the nation's first biracial candidate for president. The media, however, have continually called Obama the nation's first major party black candidate, saying he could make history as the first black president..
To investigators familiar with Obama's family history, these assertions open the possibility that Davis is Obama's biological father. Obama investigators, for the most part, develop specialty areas of interest. Jack Cashill is an expert on Obama's two autobiographical books -- and who actually wrote them.