You are looking through a microscope at onion cells and you see a cell with the sister chromatids lined up across the middle of
the cell. what phase of mitosis are you observing?
2 answers:
Answer:
The correct answer would be Metaphase.
The metaphase is the second stage of the mitosis during which all the sister chromatids are arranged at the imaginary central line termed as metaphase plate.
The centromere of each chromosome is attached with two microtubules coming from the opposite ends of a cell.
It helps in equal distribution of sister chromatids into two daughter cells.
Once the metaphase passes the cell cycle checkpoint, the cell progress to anaphase.
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If there's this picture in the question, the right answer is metaphase.
A metaphase qualifies a phase of meiosis or mitosis (following prophase and preceding anaphase) during which chromosomes, or at least kinetochores, align with the equatorial plate of the spindle. At this stage, chromosomes are at their maximum condensation and karyotypes are usually established. In the first division of meiosis, the metaphase represents the phase during which meiotic analysis is usually accomplished.
