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.
Single-gene inheritance tracked at the DNA level
Phylogeny based on the FIT2 gene
Alzheimer’s disease causes death of many neurons. This is manifested both microscopically and ...
Some human traits controlled by a single gene
Epigenetic changes to DNA, such as methylation, change patterns of gene expression by activating or
Location of brain lesions in Alzheimer disease. Plaques are concentrated most heavily in the amygdal