learn.genetics.utah.edu: Blood! http://learn.genetics.utah.edu/content/inheritance/blood/ http://learn.genetics.utah.edu/content/inheritance/blood/ http://learn.genetics.utah.edu/content/inheritance/blood/ http://learn.genetics.utah.edu/content/inheritance/blood/ University of Utah: Genes and Blood Type blood type Genes & Blood Types Genes and Blood Type learn.genetics.utah.edu: Blood! http://learn.genetics.utah.edu/content/inheritance/blood/