Exam 20: Genetics and Human Inheritance

Duffy factor is due to a chemical that occurs on the membranes of red blood cells and is sometimes used as a blood-typing attribute in the same way that ABO and Rh factor blood types are used.Recent research has found that people with Duffy factor are about 40% less likely to be infected with HIV,given similar circumstances.Since HIV affects white blood cells,how would you characterize the Duffy factor gene and why?

A cross involving one gene between two heterozygous parents is called a(n)________.

Mary died suddenly of an aortic aneurysm (i.e.,where one of the body's largest blood vessels suddenly bursts).What condition should her children worry about?