Is That What You Mean When You Talk About Gene Expression?

We've got about 20,000 genes in total. Chris Hemsworth's results relate to one particular gene called APOE. There are many mysteries as they're out with lots of human biology. We all have two copies of that gene - we've got one copy from our mother and one from our father. Some differences don't make any difference at all to us, but some can have consequences. Sometimes those consequences can be really severe.