In Which Phase of the Cell Cycle is a Polytene

Question

In which phase of the cell cycle is a polytene chromosome most likely to be found?
A) Interphase
B) Prophase
C) Metaphase
D) Anaphase
E) Telophase

Accepted Answer

Polytene chromosomes are found in the interphase stage of the cell cycle, specifically in the G and S stages (growth and synthesis). During these stages, DNA replication occurs, resulting in multiple copies of some chromosomes that then stick together and form the characteristic banding pattern of polytene chromosomes. Polytene chromosomes are not typically found in the mitotic stages of the cell cycle (prophase, metaphase, anaphase, telophase) as they are too large and diffuse to be easily observed during these stages.