Which of the following statements about genes is incorrect?
A) Genes correspond to segments of DNA.
B) Many genes contain the information needed for cells to synthesize enzymes and other proteins.
C) During fertilization, both the sperm and the ovum contribute genes to the resulting fertilized egg.
D) Under normal circumstances, each chromosome contains precisely one gene.
E) Genetic differences can result from changes in the DNA called mutations.
Answer: D