The Cell Cycle and Mitosis Biology. About 2 trillion cells are produced by you every day Per second? About 25 million Egg/Sperm  “Zygote”  Embryo 

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Presentation transcript:

The Cell Cycle and Mitosis Biology

About 2 trillion cells are produced by you every day Per second? About 25 million Egg/Sperm  “Zygote”  Embryo  Fetus  Baby

“Cell Division” “Cell Reproduction”

THE CELL CYCLE = sequence of growth and division - Interphase - Mitosis 2 Stages?

DNA Replication Exact copies of Chromosomes S **DNA must be copied then distributed

Chromosome DNA Gene Chromosome = consists of DNA tightly coiled around proteins

HUMANS “Somatic cells” (body cells) # Pairs? Single? 23 46

Why pairs? Dad Mom Diploid = 2n Autosomes Sex Chromosomes Pair 23 = Pair 1-22 =  Gene Gene 

MITOSIS PMAT Cytokinesis Acronym? Prophase Metaphase Anaphase Telophase Phases?

92 46 PMAT Cytokinesis 46

Chromosome  Sister Chromatids  DNA pairs find “partner” = Sister Chromatids “Homologous Chromosomes”

46   P A M T Pairs?

Mitosis Videos llhttp:// ll vB_m4http:// vB_m4

CYTOKINESIS Animal “Cleavage Furrow” Plant “Cell Plate”

Daughter Cells go? Interphase

Anaphase Metaphase Prophase Interphase Telophase

Cancer = uncontrolled growth/division of cells If gene that contains info for cell growth/division is mutated = Cell growth/division unregulated

Tumor “benign tumor”“malignant tumor” Metastasis Chemotherapy with toxic drugs. Radiation therapy = a mass of abnormal cells. Therapy? (start more tumors) Mammograms 