the cell cycle and mitosis biology. about 2 trillion cells are produced by you every day per second?...
TRANSCRIPT
The Cell Cycle and Mitosis
Biology
About 2 trillion cells are produced by you every dayPer 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
GeneChromosome = consists of DNA tightly coiled around proteins
HUMANS
“Somatic cells” (body cells)
# Pairs?
Single?
23
46
Why pairs?Dad Mom Diploid = 2n
Autosomes
SexChromosomes
Pair 23 =
Pair 1-22 =
Gene Gene
Gene Gene
Gene
Gene
Gene
Gene
MITOSIS
PMAT
Cytokinesis
Acronym?
ProphaseMetaphaseAnaphaseTelophase
Phases?
92
46 46
PMAT
Cytokinesis
46 46
Chromosome
Sister Chromatids
DNA pairs find “partner”= Sister Chromatids
“Homologous Chromosomes”
46
P
A
M
T
Pairs?
Mitosis Videos
• www.cellsalive.com
• http://www.youtube.com/user/ndsuvirtualcell
• http://www.youtube.com/watch?v=cvlpmmvB_m4
CYTOKINESISAnimal
“Cleavage Furrow”Plant
“Cell Plate”
Daughter Cells go? Interphase
Anaphase
Metaphase
Prophase
Interphase
Telophase
1
2
3
4
5
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
