mitosis

Cards (4)

describe the events of the first stage of mitosis
Prophase
the chromosomes condense, becoming shorter and thicker
the centrioles move to opposite poles of the cell and the spindle fibres start to develop
the nucleolus disappears and the nuclear envelope breaks down, leaving chromosomes free in the cytoplasm
the chromosomes are drawn towards the middle of the cell by the spindle fibres.
describe the events of the second stage of mitosis
metaphase
the chromosomes centromeres attach to the microtubules
the chromosomes are pulled along the spindle apparatus and line up at the equator of the cell
describe the events of the third stage of mitosis
anaphase
the centrometers split and the spindle fibres shorten
one chromatid from each chromosome is pulled to the opposite poles of the cell
mitochondria gather around the spindle fibres and provide energy for the process
describe the events of the fourth and final stage of mitosis
telophase
the chromosomes reach their respective poles and unravel to form chromatin and the nuclear envelope forms
two sets of genetic material become enclosed in separate nuclei
the spindle fibres disintegrate and the nuclear envelope and nucleolus reform