Lots of genetic diseases come down to a small change in a single gene, but how do you treat those diseases when the cells involved don’t have any DNA?

Paul Andersen details examples of natural selection in the world. He starts by explaining how changes in global temperatures are causing plants to adapt. He explains how mutations cause changes in phenotype which give organisms varying...

Lesson on sickle cell disease. Sickle cell disease is a group of heritable blood disorders with characteristic sickle-cell shaped red blood cells. Sickle cell disease leads to chronic, compensated hemolytic anemia with vaso-occlusion...

Erythrocytes a.k.a. Red Blood Cells help us transport oxygen throughout the body. But what happens when they don’t work the way they should? Let's find out.