Question

a scientist looks into a microscope and sees that replicated chromosome pairs are lined up in the center of a cell. the scientist then sees the mitotic spindle from each side of the cell attach to a chromosome. which mitotic phase is the scientist likely witnessing? (1 point) prophase telophase metaphase anaphase

Explanation:

• Prophase: Chromosomes condense, nuclear envelope breaks down. But chromosomes are not lined up at the center yet.
• Telophase: Opposite of prophase, new nuclear envelopes form. Not the case here.
• Metaphase: Replicated chromosome pairs (sister chromatids) line up at the cell's equatorial plane (center of the cell), and mitotic spindles attach to chromosomes. Matches the description.
• Anaphase: Sister chromatids separate and move to opposite poles. Not what is described.

Answer:

metaphase