What is the relationship among cells, chromosomes, genes, and dna? a. dna is a double helix structure found in the nucleus. chromosomes straighten out the dna so the code can be read by genes. b. cells contain chromosomes which are made up of genes. genes are made up of tightly wound strands of dna. c. chromosomes are tightly wound strands of dna located in cells. genes are sections of dna. d. tightly wound strands of chromosomes contain genes and are found in cells. the genes we coded sequences nucleotide read by dna.