Rice Is the Primary Nutrient Source for About One-Third of Humanity-Approximately

Rice is the primary nutrient source for about one-third of humanity-approximately 2 billion people worldwide. One major disease of this crop, called rice blight, is caused by a bacterium Xanthomonas oryzae . This disease causes the rice plant to turn yellow and wilt and can affect up to 50 percent of the crop. Wild forms of rice have a natural resistance to the Xanthomonas bacterium, but these wild forms are not usable as crop plants. Scientists have developed a blight-resistant strain, using genetic engineering. Strains of blight-resistant rice have been grown successfully in several countries. Five sample bags of rice seed arrive at a lab that includes both GMO blight-resistant rice and rice that does not have the disease-resistant gene. Assuming the scientist has a known sample of the blight-resistant rice, how might she determine bags contain additional samples of this rice strain?

A) by using a DNA profile
B) by developing a genetic marker
C) by inserting the gene into a plasmid
D) by extracting stem cells