If having a gene for Parkinson's Disease guarantees that Parkinson's Disease will develop, the presence of
the gene can be described as a
A) sufficient cause. B) necessary cause.
C) contributory cause. D) risk factor.
Question 2
In order to develop chicken pox, one must be exposed to the virus that causes chicken pox. Note, however,
that not everyone who is exposed to the virus is affected. In other words, the virus is a
A) risk factor. B) contributory cause.
C) sufficient cause. D) necessary cause.
Kidney Disease
Tracing the Source of a Water-Borne Disease
Sydney Parkinson, Portrait of a Maori.
Risk of Stroke and Heart Disease Increase with Increasing Blood Pressure
Gene segregation
Mechanisms for Regulating Bacterial Gene Expression