The Cell That Killed My Friend
By the time you reach adulthood, it is estimated that your body contains 30 trillion human cells, and an equal number of cells of foreign origin (you could accurately claim we’re all at least half immigrant in origin). Each of those 30 trillion human cells derived from the coupling of two gametes, from one zygote. Each cell contains two copies of three or so billion bases of DNA – one from your mom, one from dad – that are packaged into two copies of 22 autosomes and one pair
