Question

Which of the following best defines nondisjunction? A.loss of a piece of a chromosome B.repetitive replications of the same piece of a chromosome C.failure of chromosome pairs to sparate D.complete exchange of chromosome pieces

Answer 1

The phrase which best defines nondisjunction is c) failure of chromosome pairs to separate. The definition for nondisjunction is when homologous chromosomes or sister chromosomes fail to separate properly during cell division. Nondisjunction results in daughter cells with abnormal chromosome numbers.