crappp... :/

In Biology we learned the 5 different types of phases of an onion cell. Looking through a microscope slide at a root onion tip, we found cells that are undergoing mitosis. There are some visible chromosomes, I was able to find out what phases took place in the onion. I learned some of the events that went on in that phase!! Here are some important phases when looking at an undergoing mitosis!!

1) Interphase:  Chromosomes are not condensed. Individuals cannot however be distinguished, Chromosomes are visible but they do not appear to be held within a nuclear membrane.
Events: DNA duplicates preparing for mitosis.

2) Prophase: Visible chromosomes, unorganized in a line.
Events: Nuclear membrane dissolves, which markets the beginning of prometaphase. Proteins attach to the centromeres creating kinetochores. Microtubules are then attached at the kinetochores and the chromosomes begin moving.

3) Metaphase: Dark spots in nucleus, distinct chromosomes that are lined up along the middle of the cell. (Line is called metaphase plate)
Events: Nucleus will receive one copy of each chromosomes.

4) Anaphase: 2 clusters of chromosomes that are pulled away from one another. Motion is from a combination of kinetochore movement along the spindle microtubules, through physical interaction of polar microtubules.

5) Telophase: 2 clusters of chromosomes, nuclear membrane is formed around each other which is not longer visible after this happens.
Events: Cytokenisis of cell may form (begin) during this phase




These are the 5 different phases of an onion root cell!! whoop whoopp!!