1 / 11

Cells & DNA

Cells & DNA. Make a foldable to organize your notes. http://web.jjay.cuny.edu/~acarpi/NSC/13-cells.htm. Cells. DQ: Warm-up Question. List the components of the cell that control traits from smallest to largest. Searching for DNA? (pp. 42-43).

thi
Télécharger la présentation

Cells & DNA

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. Cells & DNA Make a foldable to organize your notes

  2. http://web.jjay.cuny.edu/~acarpi/NSC/13-cells.htm

  3. Cells DQ: Warm-up Question List the components of the cell that control traits from smallest to largest.

  4. Searching for DNA?(pp. 42-43) • The DNA of a cell is organized into structures called chromosomes. • Body cells have 23 pairs (46 total) • One half the genetic instructions comefrom the father, the other ½ from the mother • Made up of approximately 60,000 genes • Genes control traits

  5. Chromosomes p. 43 & 91 http://www.tutorvista.com/content/biology/biology-iii/chromosomes/chromosomes-structure.php http://www.pubmedcentral.nih.gov/articlerender.fcgi?artid=1054885

  6. Boy or Girl? P. 73

  7. DNAp. 89 • DNA Molecule • Sugars outer frame of “ladder” • Nitrogen bases for rungs of “ladder” • Adenine Guanine • Cytosine Thymine • The Order of the bases determines the genetic code.

  8. Chromosomes are made of twisted strands of DNA. • Chromosomes are in the nucleus. • The nucleus is in the cell. • Organisms are made of millions of cells.

  9. Mitosispp. 44-45 • Process of cell duplication in body cells. • Purpose: Growth and Repair • Exact copy of the original cell is made • Then it divides into 2 http://www.biology.arizona.edu/Cell_bio/tutorials/cell_cycle/cells3.html http://www.cellsalive.com/mitosis.htm

  10. Meiosispp. 70-71 • The process of cell duplication in sex cells • Purpose: reproduction • Chromosomes separate and go into 2 different cells • Egg & sperm cells have ½ as many chromosomes as body cells. http://www.biology.arizona.edu/CELL_BIO/tutorials/meiosis/meiosis1_movie.html http://www.cellsalive.com/meiosis.htm

  11. X X X X Mom Meiosis X X X X Dad Egg Cell Sperm Cell / / / / \ \ \ \ ½ of the genes come from mother ½ of the genes come from father X X X X

More Related