Mitosis Flashcards
what is a chromatid
replicates of chromosomes
What is the definiton of cytokinesis
Division of cytoplasm of a cell after mitosis
What are three reasons for mitosis
Tissue repair
Growth
Asexual reproduction
what type of organisms reproduce asexually
Fungi
Plants
protoctistae
some captive female sharks
How do multicellular organisms use mitosis to grow
produce cells which are genetically identical to eachother and the parent cell.
what happens in prophase
Chromosomes consist of two identical sister chromatids and are now condensed and visible under a stain.
Nuclear envelope breaks down.
centriole divides, two daughter centrioles move to opposite poles.
tubulin threads begin to form a spindle between the centrioles
Describe chromosomes in prophase stage
Two identical sister chromatids, now condensed and visible under a stain and joined at a centromere.
Where do spindle fibres form in plants
Formed from the cytoplasm
What happens in metaphase
identical sister chromatid pairs attach to the equator by centromere
Nuclear envelope is fully gone
what stage is cell A in
Metaphase
what takes place is Anaphase?
Centromere between the two sister chromatids splits
Motorproteins walk on tubulin threads and pull each sister chromatid towards opposite poles.
The chromosomes travel in a V-shape due to them being pulled by their centromere.
what stage of mitosis is this cell in
metaphase
What happens in telophase
The separated chromosomes reach the opposite poles.
a new nuclear envelope forms around each set of new chromosomes.
Resulting in a cell which is genetically identical to one another and the parent cell.
What is the name of the protein which attaches the spindle fibres to the centromere of the chromosome
Kinetochores.
What are the spindle fibres made from
Microtubules
Made of a protein called Tubulin
