1 / 16

HUMAN DNA

HUMAN DNA. DNA- genetic information of the cell (Blueprint of Life) * NUCLEIC ACID *. Storing DNA. Chromatin- uncoiled DNA ( store this way during normal cell functions ) Chromosomes- DNA coiled around proteins ( stored this way when the cell reproduces ).

zocha
Download Presentation

HUMAN 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. HUMAN DNA DNA- genetic information of the cell (Blueprint of Life) * NUCLEIC ACID *

  2. Storing DNA • Chromatin- uncoiled DNA (store this way during normal cell functions) • Chromosomes- DNA coiled around proteins (stored this way when the cell reproduces)

  3. In order for a cell to make a new cell it must replicate (copy) its existing chromosomes • Replicated Chromosomes • Sister Chromatids- exact copies of DNA • Centromere- connects sister chromatids Centromere

  4. Karyotype • Photograph of all chromosomes in a cell, arranged by size

  5. Types of Chromosomes • Homologous Chromosomes- two chromosomes that carry the same type of information, but are not identical • Autosomes- non-sex chromosomes • Humans: 22 pairs of autosomes + 1 pair of sex chromosomes = 23 pairs or 46 chromosomes

  6. Cell Cycle- process where cells grow and divide • Important: growth, wound healing, replace cells (old skin cells)….

  7. Cell structures involved in reproduction • Chromosomes • Spindle- protein fibers that move chromosomes • Centrioles- structures that anchor spindle at ends of the cell

  8. NORMAL CELL LIFE CYCLE • INTERPHASE • GROWTH – G1 – growth of organelles • SYNTHESIS – S – synthesis of new DNA • GROWTH – G2 – growth of proteins • MITOSIS • division of duplicated DNA • PMAT – Prophase, Metaphase, Anaphase & Telophase

  9. Stages of Mitosis • Prophase • Chromosomes present themselves; they become visible. • Metaphase • Chromosomes line up in the middle; on equator. • Anaphase • Centromeres divide. Chromosomes move apart • Telophase • Chromosomes uncoil, cytokinesis begins, and becomes two cells.

  10. Mitosis In Action! • Mitosis • Mitosis

  11. CANCER – OUT OF CONTROL CELL GROWTH • BENIGN or MALIGNANT – A difference in activity • METASTASIS – Spread away from the site of origin • Carcinoma, Sarcoma, Leukemia & Lymphoma

More Related