Mitosis Flashcards
1
Q
what are karyotypes
A
the number and visual appearance of the chromosomes in the cell nuclei of an organism or species.
2
Q
what do multicellular organisms depend on cell division for
A
- development from a fertilized cell
- growth to adult
- repair
3
Q
describe what duplicated chromosomes are
A
- are 2 sister chromatids, which later sperate
4
Q
what are the 5 phases of mitosis
A
- prophase
- prometaphase
- metaphase
- anaphase
- telophase
5
Q
what is produced through mitosis
A
- produces 2 genetically identical identical daughter cells
6
Q
describe what happens in Prophase
A
- is the first phase of mitosis,
- centrioles move to opposite poles
- chromosomes become visible
7
Q
describe what happens in Prometaphase
A
-the nuclear envelope breaks down (in many but not all eukaryotes) and the chromosomes attach to the mitotic spindle
8
Q
describe what happens in Metaphase
A
- chromosomes are lined up at the metaphase plate
- each sister chromatid is attaches to a spindle fiber originating from opposite poles
9
Q
describe what happens in anaphase
A
- Centromeres split into 2
- sister chromatids are pulled towards opposite piles
10
Q
describe what happens in telophase and cytokinesis
A
- chromosomes arrive at opposite poles and begin to decondense
- nuclear envelope material surrounds each set of chromosomes
- the mitotic spindle breaks down
spindle fibers continues to push poles apart
