Question

Explain the first stage of mitosis-metaphase

Answer 1

Answer:

In prophase, the first step in mitosis, the nuclear envelope breaks down and chromosomes condense and become visible. ... In metaphase, the mitotic spindle is fully developed, centrosomes are at opposite poles of the cell, and chromosomes are lined up at the metaphase plate.

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Answer 2

Answer:

Mitosis is an incredible process with precise steps and regulation. Without mitosis, life would be impossible. However, the process can seem a bit complex.

Prophase is the first stage of mitosis. In prophase,

chromosomes condense and become visible

spindle fibers emerge from the centrosomes

nuclear envelope breaks down

nucleolus disappears

Prometaphase is the second stage of mitosis. In prometaphase,

chromosomes continue to condense

kinetochores appear at the centromeres

mitotic spindle microtubules attach to kinetochores

centrosomes move toward opposite poles

Metaphase is the third step in mitosis. In mitosis,

mitotic spindle is fully developed, centrosomes are at opposite poles of the cell

chromosomes are lined up at the metaphase plate

each sister chromatid is attached to a spindle fiber originating from opposite poles

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