Which of the Following Is True of the Flo Gene

Which of the following is true of the flo gene?

A) heterozygotes are twice as likely to be obese
B) the gene is expressed in the brain
C) people who are obese are lacking the flo gene
D) most children in the United States who are obese have two copies of the flo gene
E) flo genes are X-linked, thus boys are more likely than girls to be obese