試題詳解

50. Whether during mitosis or meiosis, sister chromatids are held together by proteins referred to as cohesions. Such molecules must have which of the following properties?
(A) They must reattach to chromosomes during G1.
(B) They must be removed before anaphase can occur.
(C) They must be intact for nuclear envelope reformation.
(D) They must be removed before meiosis can begin.
(E) They must persist throughout the cell cycle.