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DNA, or deoxyribonucleic acid, is the hereditary material in humans and almost all other organisms. DNA has become a commodity sought by scientists and biotech companies, each hoping to collect enough to wring out new knowledge in new ways. Ancestry.com, the genealogy company, announced in August 2017 that it has tested more than seven million people, including two million during the last four months of 2017.

A doctor at a fertility clinic was forced to make a startling revelation to a couple seeking treatment at the center. The couple, who cannot be named to due to patient confidentiality restrictions, had been struggling to conceive and came to the clinic to take part in the in vitro fertilization (IVF) process.

Images of all 24 human chromosomes and different genes that have been mapped to them. Free wall poster available from Web site.

Interactive website for learning about E. coli