Question

mitosis: separation of sister chromatids
during which phase of mitosis do the sister chromatids separate and head towards opposite poles of the cell?
multiple choice
prometaphase
metaphase
telophase
anaphase
prophase

Explanation:

• Prometaphase: Nuclear envelope breaks down; spindle fibers attach to chromosomes.
• Metaphase: Chromosomes align at the cell's equator.
• Telophase: New nuclear envelopes form; chromosomes de - condense.
• Anaphase: Sister chromatids separate (due to the breakdown of cohesin proteins) and move to opposite poles via spindle fiber shortening.
• Prophase: Chromosomes condense; spindle apparatus forms.

Answer:

Anaphase