The article does nothing of the sort. The kid will be born without the MUTANT ALLELE for BRCA1 that causes predisposition to breast cancer. If s/he were born without the BRCA1 gene locus, s/he would almost definitely develop cancer (all sorts of them), since BRCA1 is a tumor suppressor. If you knock out a tumor suppressor, you get tumors (hence the name). The oncogenic allele is a loss-of-function for the normal gene.
Slashdot Mirror
The article does nothing of the sort. The kid will be born without the MUTANT ALLELE for BRCA1 that causes predisposition to breast cancer. If s/he were born without the BRCA1 gene locus, s/he would almost definitely develop cancer (all sorts of them), since BRCA1 is a tumor suppressor. If you knock out a tumor suppressor, you get tumors (hence the name). The oncogenic allele is a loss-of-function for the normal gene.