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

C. failure of chromosome pairs to separate
The failure of paired chromosomes or sister chromatids to separate and go to different cells during meiosis.
As a result, one daughter cell has two chromosomes or two chromatids, and the other has none.