Indicate whether each of the following descriptions better applies to proto-oncogenes (P) or tumor suppressor genes (T). Your answer would be a four-letter string composed of letters P and T only, e.g. PPPT.
( ) Cancer mutations in these genes are usually recessive.
( ) Cancer mutations in these genes include gene duplications.
( ) Cancer mutations in these genes are responsible for most hereditary cancers.
( ) Cancer mutations in these genes are commonly in the form of nonsense (truncating) mutations that abort protein synthesis.