Three distinct classes of photoreceptors mediate the effects of UV-A/blue light (320–500 nm): the cryptochromes, phototropins and the ZEITLUPE (ZTL) family of proteins

TLS Online TPP Program

#Id: 8893

#XL - T Zoology

Merotelic attachment 

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

TLS Online TPP Program

#Id: 8894

#XL - T Zoology

Syntelic attachment 

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

TLS Online TPP Program

#Id: 8895

#XL - T Zoology

Monotelic attachment 

only one kinetochore can attach to microtubules

TLS Online TPP Program

#Id: 8897

#XL - T Zoology

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

TLS Online TPP Program

#Id: 8898

#XL - T Zoology

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