Question

What's a simple definition for spindle fiber

Answer 1

during mitosis and meiosis, spindle fibers pull chromosomes apart

Answer 2

In Mitosis, it's called the "Mitotic Spindle" and in Meiosis it's called the "Meiotic Spindle." The purposes are the same because both separate the daughter cells and chromosomes during cell division. They are the little thread-like lines that form during metaphase.

Answer 3

Also, they split the chromosomes apart by literally pulling the chromosome in different directions towards the opposite "poles."

Answer 4

In cell biology, spindle apparatus refers to the subcellular structure that segregates chromosomes between daughter cells during cell division. It is also referred to as the mitotic spindle during mitosis or the meiotic spindle during meiosis.
While the spindle apparatus is composed of hundreds upon hundreds of proteins,[1] the fundamental machinery are the spindle microtubules. Attachment of microtubules to chromosomes is mediated by kinetochores, which actively monitor spindle formation and prevent premature anaphase onset. Microtubule polymerization and depolymerization dynamics drive chromosome congression. Depolymerization of microtubules generates tension at kinetochores;[2] bipolar attachment of sister kinetochores to microtubules emanating from opposite cell poles couples opposing tension forces, aligning chromosomes at the cell equator and poising them for segregation to daughter cells. Once every chromosome is bi-oriented, anaphase commences and cohesin, which couples sister chromatids, is severed, permitting the transit of the sister chromatids to opposite poles

Answer 5

Remember when you take info from websites to site where you got it.

Answer 6

Second response is from http://en.wikipedia.org/wiki/Spindle_apparatus, if anyone actually bothered to see where it's cited from. lolol