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G7 science Ch3.3


What are the three main stages of the cell cycle? Interface, mitosis, Cytokinesis
interphase FIRST stage of cell cycle, period between two mitotic divisions during which the cell grows ,takes place before cell division occurs, cell copies its DNA.
During what phase of cell cycle are organelles and enzymes produced? early interface
What is replication? the process by which the cell makes a copy of its DNA in the nucleus before cell division
What holds all the information the cell needs to carry out its functions? DNA
What is the thread like structure within the cell nucleus that contains DNA that is passed on from one generation to the next Chromosome
The end of replication, the cell contains ____ sets of chromosomes? two identical
In animal cells only (not plant cells), this structure is duplicated centrioles
What are centrioles found only in animal cells, they are cylindrical cell structures that helps the cell divide
mitosis stage TWO of cell cycle, during which the cell’s nucleus divides into 2 new nuclei; one set of DNA is distributed into each daughter cell
Cytokinesis completes the process of cell division, final stage of cell cycle. cell cytoplasm divides and organelles distributed into daughter cells.
What is difference between cytokinesis in animal and plant cell? In animals, cell membrane squeezes together & organelles+cytoplasm divide in 1/2. Plants have a rigid wall, a cell plate forms in middle. the cell plate begins to form new cell membranes around daughter cells. Lastly cell walls form around cell membranes.
What is the process of cell division that forms two new nuclei, each of which has the same number of chromosomes mitosis
Name the four parts of mitosis in order prophase, metaphase, anaphase, telophase (PMAT)
Explain prophase 1st stage of mitosis; characterized by the condensing of the chromosomes + movement of centrioles to opposite sides of the cell + nuclear envelope breaks down+ spindle fibers form a bridge between the ends of the cell
what stage of mitosis do spindle fibers form a bridge between the ends of the cell? prophase
what stage of mitosis does nuclear envelope break down? prophase
what stage of mitosis do centrioles move to opposite sides of cells? prophase
what stage of mitosis do chromosomes condense? prophase
Metaphase second stage of mitosis during which each chromosome attaches to a spindle fiber at its centromere, and all of the chromosomes move to the cell's equator
what stage of mitosis do attached to spindle fibers at centromere? metaphase
what stage of mitosis do chromosomes lineup at the cell’s equator? metaphase
anaphase 3rd stage of mitosis; centromere splits and pulls chromatids apart (now called chromosomes since they separated). Chromosomes then drawn by spindle fibers to opposite ends of cell. Sell stretches out.
what stage of mitosis do chromatids separate? Anaphase
what stage of mitosis does centromere split? anaphase (recall centromere holds chromatids together)
what stage of mitosis do chromosomes get drawn buy spindle fibers to opposite ends of cell? anaphase
what stage of mitosis does so stretch out? anaphase
telophase the final stage of mitosis, during which a nuclear membrane forms around each set of new chromosomes
what stage of mitosis does nuclear membrane forms around each new cell with Its new chromosomes telophase
T/F cytokinesis begins during mitosis TRUE; Into daughter cells
Chromatid one of the two rod like parts of a chromosome, an EXACT copy of the other containing identical DNA
Centromere structure that holds chromatids together until they move apart later in mitosis
When chromatids separate, they are called __________ chromosomes
Created by: ka1usg