What is a chromosome
> Long coils of DNA located in the nucleus of both plant and animal cells
2 chromosomes are held by centromere
Diploid
Cells that two sets of chromosomes
Haploid
Cells that have a single set of chromosomes only
What is mitosis
> mitosis is the process whereby the original parent cell divides and produces two daughter cells
What is meiosis
It is the process whereby cells divide and the end result is 4 haploid daughter cells
*the cells has half the number of chromosomes as the parent cell
Importance of mitosis
> allows the growth of multicellular organism
repairing and replacing dead or damaged cells
passes on genetic information
What is the cell cycle
> series of activities or processes that occur in a cell leading to its division and replication
Mitosis goes through what three stages
1)interphase
2)karyokinesis(cell division)
-mitosis and meiosis
3) cytokinesis
Name all the phases of mitosis
> prophase
metaphase
anaphase
telophase
*cytokinesis(starts at the same time the final phase of mitosis occurs)
Explain the phase interphase
*longest phase in the cell cycle
*DNA replication Occurs just before prophase
Prophase
Chromatin network unwind-visible as chromosomes
Spindle fibres form
Membrane disappears
Side note-centriole(animal cell only)
Metaphase
Chromosomes move to the equator of the cell
Chromosomes attached to the spindle fibers at the centromere
Anaphase
Spilts
Spindle fibres pull daughter chromosomes towards the poles of the cell
Telophase
Daughter chromosomes arrive at the poles of the cell to form chromatin material
Nuclear membrane forms around chromatin material
