How can a genetic disorder, such as turner's syndrome, occur? a) fragmentation b) a point mutation c) crossing over during meiosis d) nond

answer; i believe that the correct answer is(d) nondisjunction during meiosis;

answer: a. a gene that causes a specific trait.

during the process of dna replication, brdu can replace thymidine and incorporate into the newly synthesized dna, cell proliferation thus can be reflected in the extent of brdu incorporation.