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Mitosis

QuestionAnswer
Prokaryotes -reproduce by binary fisson -just one parent, mother bacteria -produce two daughter cells
Somatic non-reproductive cells, divides through process of mitosis
Gametic reproductive cells, undergo mitosis then utilize a second process called meiosis
Interphase the time between cell division when they perform normal functions
Chromatin consists of long strands of DNA wrapped around a cluster of proteins called a histone
Human cells have 46 chromosomes 23 from mom and 23 from dad
Interphase has G1, S, G2 DNA duplicating
Mitosis nucleus physically dividing into two, each containing an exact copy of the original DNA
Prophase DNA begins to condense, forming chromosomes, nucleolus disappears and spindle fibers are formed by centrioles attached to the centromeres
Metaphase -chromosomes moved and align themselves in a narrow central zone in the cell -chromosomes can't move independently -network or protein microtubules called spindle apparatus
Anaphase -begins with the centromere of each chromatid pair splits -daughter chromosomes pull towards opposite ends of the cell by the spindle fibers
Telophase nuclear membranes form around the daughter chromosomes, DNA returns to its uncoiled chromatin, nucleolus starts to become visible
Cytokinesis -causes a shadow indentation across the cell membrane called a cleavage furrow in animal cells -starts a process that ends with daughter cells separating in plant cells
Growth Factors proteins secreted by body cells that stimulate other cells to divide
Density-Dependent Inhibition where they stop dividing when conditions become to crowded
Anchorage Dependence cells need to be contacted with a solid surface before it divides
Cancer Cells form large masses
Benign doesn't spread
Malignant spreads
In multicellular organisms mitosis is used for tissue growth, regeneration and repair
In unicellular organsims mitosis is the primary form of reproduction
Asexual Reproduction one parent
Sexual Reproduction two parents fusion of 2 sex cells; 1 from each parent
Spermatogensis -male gametes,sperm, begins as stem cells in the testes -produce two daughter cells -1 will stay and the other 1 will migrate towards the epididymis -gametes are given the diploid notation (46)
Meiosis -end product is haploid (23) -has two parts
Crossing Over -chromosomes cross over -unique phenomenon
Oogenesis -the ovaries produce eggs, cytoplasms is only in 1 out of 4 daughter cells -the rest are called polar bodies
Created by: Madison1998