Theory of recapitulation - Ernst Haeckel

He proposed that the embryonic development of an individual organism (its ontogeny) followed the same path as the evolutionary history of its species (its phylogeny).

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#Id: 8893

#XL - T Zoology

Merotelic attachment 

A kinetochore can attach to microtubules emanating from both poles at the same time

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#XL - T Zoology

Syntelic attachment 

Both kinetochores of a sister chromatid pair can attach to microtubules from the same pole

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#XL - T Zoology

Monotelic attachment 

only one kinetochore can attach to microtubules

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#XL - T Zoology

Sensing mechanism used by cells to detect incorrect chromosome attachments is based on tension.

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#Id: 8898

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If Amphitelic attachment occur  Microtubules pull kinetochores; cohesins resist this pulling force. The resulting tension leads to the outer kinetochore component Ndc80 being pulled away from the protein kinase Aurora B

TLS Online TPP Program

#Id: 8900

#XL - T Zoology

The Aurora protein kinase family members Aurora A and Aurora B and their associated regulatory factors sense kinetochores that are not under tension and sever these microtubule attachments