In general, Yes True <span />
Two genes, BRCA1, located on chromosome 17q21 (5,6), and BRCA2, located on 13q12-13 (7–9), have been shown to predispose to familial breast cancer.
Nondisjunction is the failure of one or more pairs of homologous chromosomes or sister chromatic.
The species will begin to die off to fall below the carrying capasity
It would be epithelial tissue that covers it.