BIOL 1000 Lecture Notes - Lecture 8: Sister Chromatids, Nuclear Membrane, Centrosome
Document Summary
The actual chromain turns into the wound form. 2 centrosomes begin to facilitate the process of microtubules. This is called prometaphase (considered a separate method. Proteins are sill there, but the envelope is gone. So you have 2 choromosoms made up of sister chromaids. The centrosomes (things outside) have entered and pushing the centrosomes apart. Microtubes atach themselves to centromeres of actual chromosomes. The protein they atach to is kinectcore (locaion in centromeres). Spindles from centrosomes are atached to chromosomes (sister chromatides) and. 46 of these going on in the cell! The centrosomes of the chromaid is split and pulled toward centrosomes. As soon as they are both split, they are each considered a chromosomes. Once the sister chromaids are split they turn into chromosomes. So the centrosome has pulled both chromaids to itself. One from the male chromosome and one from the female chromosomes. This new chromosome develops a nuclear envelope around the chromosomes.
