Chapter 9 spring 2011 - Chapter 9 Cell Reproduction...

This preview shows 1 out of 11 pages.

Chapter 9 Cell Reproduction Cell Reproduction
Image of page 1

Subscribe to view the full document.

Different Kinds of Cell Division Different Kinds of Cell Division Binary Fission = Cell division in prokaryotic prokaryotic cells Mitosis = Cell division in somatic ( non-sex non-sex ) eukaryotic cells Meiosis = Cell division in eukaryotic sex cells ( gametes gametes ); egg & sperm
Image of page 2
Sexual Versus Asexual  Reproduction Sexual Reproduction – When offspring are produced by the fusion of gametes (sperm & egg) from two adults Gametes are made through meiosis Cells are genetically unique Asexual Reproduction – reproduction in which offspring are formed from a single parent , without having a sperm fertilize an egg Offspring are produced through mitosis Offspring are genetically identical to the parent cell
Image of page 3

Subscribe to view the full document.

Prokaryotic Binary Fission Cell reproduction of prokaryotic cells like bacteria that produces two two genetically identical genetically identical daughter cells by division division (fission). Before cell division, DNA replicates replicates . The two chromosomes (circular) or nucleoid are attached inside the plasma plasma membrane membrane .
Image of page 4
Following DNA replication, the two chromosomes move apart as a cell lengthens. When cell is approximately twice twice its original length, the plasma membrane plasma membrane grows inward, and a new cell wall cell wall forms dividing the cell into two approximately equal daughter cells.
Image of page 5

Subscribe to view the full document.

Image of page 6
Mitosis For growth growth , development development , repair repair and maintenance. It is involved in the development of a fertilized fertilized egg egg into a multicellular multicellular organism organism .
Image of page 7

Subscribe to view the full document.

Image of page 8
Chromosome Number in Mitosis This nuclear division leaves the chromosome number constant constant . A parent cell yields two two genetically identical genetically identical daughter cells daughter cells with the same number of chromosomes.
Image of page 9

Subscribe to view the full document.

Eukaryotic Chromosomes When cell is not undergoing division, DNA in the nucleus is a tangled mass of threads called chromatin chromatin (not visible with a light microscope). At cell division, chromatin becomes highly coiled and condensed and is now visible as chromosomes chromosomes .
Image of page 10
Image of page 11
You've reached the end of this preview.

{[ 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