Biolog 9 - Chapter 9 Mitosis and Cell Reproduction A Cell...

Info icon This preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
Chapter 9: Mitosis and Cell Reproduction A. Cell Division Mechanisms Cytoplasmic division in Eukaryotes helps 1. Increase body size 2. Replace dead cells 3. Repair damaged tissues Each daughter cell receives a required number of chromosomes and cytoplasm and the cell nucleus always divides first. Meiosis also precedes formation of gametes and is the basis of sexual reproduction in eukaryotes. B. Cell Cycle Interphase - the cell grows by producing proteins and cytoplasmic organelles, copies its chromosomes, and prepares for cell division. Interphase has three subphases: the G 1 , S, and G 2 phases Chromosomes are duplicated only during the S phase. Prophase - the chromosomes are tightly coiled, with sister chromatids joined together. The nucleoli disappear. The mitotic spindle begins to form. The centrosomes move away from each other, apparently propelled by lengthening microtubules. Metaphase - The nuclear envelope fragments and microtubules from the spindle interact with the condensed chromosomes. Attached fibers to chromatids. Spindle
Image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the 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