Chromosomes moved quicker towards the poles while significant microtubule regions stayed stationary prior to eventually breaking apart. Therefore, kinetochore microtubules shorten at the kinetochore.




You are watching: What evidence suggests that during anaphase, kinetochore microtubules shorten at the kinetochore?


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Video Transcript

which evidence argues that throughout Anna step kinetic or micro tubules shorting out the kinetic or so what biologists did come answer this question was fluorescent lee labeled the chromosomes and the micro tubules here I've shown the chromosomes in blue and the Magi bills and also red, and the biologist wondered that there space two possible places the the micro tubules might shorten the ashore in right here at the spindle pool end Orca sure in here at the Connecticut Rand, if the if it sure ends in ~ the spectacle than it's kind of favor a fishing rod the reels in the line. And if in short and also at the kinetic or then that would typical that the micro tubules are deteriorating follow me the way, pass in the the chromosome through physically shortening the micro tubules and what they uncovered was by marking a spot on the micro TV. You'll here have indicated the spot in green, however what they walk was supplied a laser come dark in the micro tubules in ~ a specific spot. They uncovered that if it was sort of choose the fishing rod hypothesis, then the mark spot would reach the spindle traction first, due to the fact that it's front of the kinetic, or that the the the that the Connector and the Crimson. However if the did hear if the micro tubules shortened in ~ the kinetic, or climate the chromosome would certainly reach the spindle poll before the note spot and also the mark spot wouldn't in reality move. And also that's exactly what lock found. They discovered that the note spot was stationary and that the chromosome ultimately surpassed it and reached that pinnacle first. Therefore what they found was the the micro tubules disassemble at the Connecticut or here indicated in black and hitters the chromosome in blue and the two billion molecules actually disassembled right here next come the chromosome and also move it along the way. And also so that's how they discovered that the Connecticut mecca trivial, quick in at the