In September 2015, Monica was diagnosed with breast cancer, which was already in the middle stage. Monica was an identical twin, and her 38-year-old sister Erika had also had regular mammograms and ultrasounds without ever detecting cancer. In Monica’s left breast, a tumor had grown to be the size of a tennis ball, and the cancer cells had spread to her lymph nodes.
These twins share the same genes, so why did one develop cancer and not the other?
We have always thought that it is the genes , our DNA, that determine everything about us. In fact, there is another decisive factor: the “switch” of genes. To put it this way, a gene determines that two twins have the same necklace, but the“switch” of the gene determines whether they wear it or not, when they wear it, and how long they wear it….