Respuesta :
a spindle fiber is one single filament which is coming from the poles onto the center. Remember that this spindle fiber isn't part of the chromosome, it just helps with holding everything in place. Microtubules are responsible for pushing the poles of the spindle apart.
I hope this helps!!
This is what I learned in college about Microtubules:
- found in all eukaryotic cells
-hollow and in a cylinder like shape
-I believe they are also straight
-have several functions, which are
1) helps with the structure of the cell and helps the cell maintain its shape
2) deals with organelles moving throughout the cytoplasm. Examples of organelles are, endoplasmic reticulum, Golgi apparatus, vacuole, mitochondria, nucleus and a few others. These organelles are separate and are surrounded by a lipid membrane. Lipids are fats.
So that is the general info about Microtubules
Now lets look at Spindle Fibers
- these are fibers that go from one end of the "pole of a cell" to the other "pole of a cell." The poles are opposites of each other in a chromosome. If you don't know what chromosome are, they look like little x's and they consists of our DNA makeup.
-pull sister chromatids apart in the anaphase part of mitosis and during the anaphase II part of meiosis
-I believe they are comprised of protein
Hopefully this helped and is not too confusing. I tried to keep it as simple as possible. Good luck!!!