1 / 10

Cell Division

Cell Division. 7 th Grade Science Chapter 3 – Section 5. Cell Division and Growth. A single cell _______ and then _______, forming two new cells. A single cell grows and divides producing ____ new cells. Then the two cells grow and divide forming ____and so on.

cloris
Download Presentation

Cell Division

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Cell Division 7th Grade Science Chapter 3 – Section 5

  2. Cell Division and Growth • A single cell _______ and then _______, forming two new cells. • A single cell grows and divides producing ____ new cells. • Then the two cells grow and divide forming ____and so on. • The process of cell growth and division is _________ and it happens in __________.

  3. Cell Division and the Cell Cycle __________ - sequence of growth and division – a cell grows, prepares for division, and divides into 2 new cells. • The two new cells are called _____________. • Each daughter cell begins the ___________ again. Three stages in the cell cycle: 1. _________ - cell grows 2. __________ - cell divides 3. __________ - two new cells are formed

  4. Stage 1. Interphase • During _________, the cell grows, makes a copy of its DNA, and prepares to divide into two new cells. • During the first part of interphase, the cell _______ to its full size and produces structures that it needs • The next part of interphase, the cell makes an exact copy of its _____ in its nucleus. This process is called ______________. • The cell prepares itself for _________

  5. Stage 2 - Mitosis • __________ - one copy of the DNA is distributed to each of the two new daughter cells. • There are four phases in the process of mitosis 1. ________ 2. _________ 3. _________ 4. __________

  6. Prophase, Metaphase, Anaphase • Prophase - Chromatin in the ________ condense to form ___________. The thread-like chromatin move to opposite sides of the nucleus. The _______________ breaks down. • Metaphase – The __________ line up across the center of the cell. • Anaphase – The chromosomes separate and each ________ becomes a new chromosome. The new chromosomes move to opposite ends of the cell. The cell stretches out – ends are pulled apart.

  7. Telophase • During _________ a new ____________ forms around each new group of chromosomes. Stage 3 – Cytokinesis ______________ - the cytoplasm divides and the organelles are distributed to each of the two new cells. Cytokinesis begins during _________.

  8. Cytokinesis • The __________ pinches into two new cells. • Each daughter cell gets about half of the ____________. • Each daughter cell has the same number of ____________as the parent cells • At the end of cytokinesis, ___________ begins again.

  9. Structure and Replication of DNA • ______________ - ensures that each daughter cell will have the genetic information it needs to carry out its activities. • Structure of DNA – twisted ladder, _________ • Each rung of the ladder is made up of _____________. There are four different bases - ____________, _____________, ____________, and ____________

  10. DNA Replication • _____________ begins when the two sides of the DNA strand ______and separate. The molecules of DNA separates between the two ___________________. • Nitrogen bases that are floating in the ________ pair up with bases on each half of the DNA molecule. • Adenine pairs with Thymine, Guanine pairs with cytosine.

More Related