Awoman with a genetic disease marries a man who does not carry the disease. it is not possible for their children to carry the disease. the disease must be
-sex-linked
-recessive
-dominant
-caused by an extra chromosome

A woman with a genetic disease marries a man who does not carry the disease. It is not possible for their children to carry the disease. The disease must be recessive.
A recessive disease requires both parents to have it in order to pass it down to children. 

Your answer is  d.)relationship between pressure and air volume and led to the understanding of how respiration works