Does spindle fibre arises frof astral rays ofothe centrosome
Does spindle fibre arises frof astral rays ofothe centrosome
Here is the answer to your question
Aster simply means star, i.e. a point from which something radiates. In this case, that something is microtubules.
All the fibers that radiate from centrosome are called SPINDLE FIBERS(also microtubules). They are called spindle fibers because with the union of chromosomes, they form the mitotic spindle.
Microtubules are of three types:
1)Kinetochore microtubules: those microtubules that attach to chromosomes.
2)Interpolar microtubules: those microtubules that bind to the microtubules of the opposite pole.
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3)Astral microtubules: those microtubules that attach to neither chromosomes nor to each other, but they end abruptly in cortical cytoplasm. (It is believed that astral microtubules help the centrosomes to stay firmly at their position.
Here is the answer to your question
Aster simply means star, i.e. a point from which something radiates. In this case, that something is microtubules.
All the fibers that radiate from centrosome are called SPINDLE FIBERS(also microtubules). They are called spindle fibers because with the union of chromosomes, they form the mitotic spindle.
Microtubules are of three types:
1)Kinetochore microtubules: those microtubules that attach to chromosomes.
2)Interpolar microtubules: those microtubules that bind to the microtubules of the opposite pole.
PAY ATTENTION NOW!!
3)Astral microtubules: those microtubules that attach to neither chromosomes nor to each other, but they end abruptly in cortical cytoplasm. (It is believed that astral microtubules help the centrosomes to stay firmly at their position.
