Chromosomes first become visible as two sister chromatids held together at the centromere during which one of the following phases?
A) G₁
B) metaphase
C) S
D) prophase
E) anaphase

Question

Quizplus · Accepted Answer

Chromosomes first become visible during prophase, as they begin to condense and the nuclear envelope breaks down. During prophase, sister chromatids become visible as two identical strands held together at the centromere region.

Chromosomes First Become Visible as Two Sister Chromatids Held Together