9. Which of the following term refers to the process of making changes in the DNA code of a living organism? A. selective breeding B. genetic engineering C. inbreeding D. hybridization 10. Which of the following is the ultimate source of genetic variation? A. inbreeding B. hybridization C. mutations D. radiation 11. What do you call an entire collection of genes within human cells? A. human genome B. karyotype C. pedigree D. gene map Page