Card Set Information
powerpoint exam 2
inside nucleus and has 2 chromosomes of each type
have one chromosome of each type
two kinds of nuclear division?
a process by which two new, genetically identical nuclei are produced from a single parental nucleus
a process by which a diploid nucleus produces four haploid nuclei
1st phase of cell cycle? what happens?
cell is maturing, synthesizing things it needs
2nd phase of cell cycle? what happens?
S (synthesis) phase
replicate genetic info, make copy of chromosomes
3rd phase of cell cycle? what happens?
cell is preparing to divide
4th phase of cell cycle?
cell divides and process begins again
what happens to cells who do not move out of G1 phase?
they stay the same the rest of life
can happen in spinal chord
describe what nucleus looks like during nuclear division?
stages of nuclear division
chromatin condenses into visible, double chromosomes attached at the centromere
during what phase of mitosis does the nuclear envelope being to disintegrate and the spindle apparatus begins to form?
chromosomes become aligned along the middle of the cell, spindle apparatus is complete
chromosomes begin to "move" to opposite poles of the cell along the spindle apparatus
everything that happened in prophase is undone, chromosomes become unorganized, nucleus reappears, nuclear envelope forms. what phase of mitosis?
period between actual phases?
where chromatids attach
when is mitosis over?
when you have 2 genetically identical nuclei
cytokinesis in an animal?
cell splits and creates 2 genetically identical cells that are just like the mom cell
cytokinesis in plant?
cell wall forms in middle of plant cell aka cell plate
what is mitosis used for?
general growth and development
what is considered uncontrolled mitosis?