6.Chapter 11 - contact chromosomes at kinectochore •...

Info icon This preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
Chapter 11 – Mitosis Finish + Do ch 12., (ch 4, 14, 15, 16) 11.1 Mitosis and the Cell Cycle Chromosomes exists of single long stranded DNA double helix strands Prior to mitosis each chromosome is copied First Gap -> DNA synthesis -> Second Gap -> Mitosis 11.2 How does Mitosis take place? Histones: eukaryotic chromosomes normally exist as extremely long, threadlike, strands consisting of DNA associated with globular proteins Chromatid: replicated chromosome Sister chromatids represent exact copies of the same genetic information. Each chromatid contains one long DNA double helix. At the start of the M phase, then, each chromosome consist of 2 sister chromatids that are attached to one another at the centromere. Prophase: Mitosis begins with the new events of prophase. The chromosomes have already replicated, formation of mitotic spindle. Prometaphase: nucleolus disappears and nucleur envelope fragments, Spindle fibres
Image of page 1
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: contact chromosomes at kinectochore • Metaphase: Chromosomes complete migration to middle. • Anaphase: Sister chromatids separate. Chromosomes are pulled to opposite poles of the cell. • TeloPhase: The nucleur envelope re-forms and the spindle apparatus disintegrates. • Cytokinesis: Cell division begins:Actinmyosin ring causes the plasma membrane to begin pinching in. • Chromosome: a Structure composed of a DNA molecule and associated proteins • Chromotin: The Material that makes up eukaryotic chromosomes, consists of DNA molecule complexed with histone proteins • Chromotid: one strand of replicated chromosome with its proteins • Centromere: The structure that joins sister chromatids • Kinectochore: The structure on sister chromatids where spindle fibres attach •...
View Full Document

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern