Cell Cycle and mitosis üCell cycle and mitosis is a repeating sequence of cellular growth and division during the life of an organism. http: //highered. mheducation. com/sites/ 0072495855/student_view 0/chapter 2/an imation__how_the_cell_cycle_works. htm l Video DNA Copied Cells Mature Cells prepare for Division Identical daughter Cells gregate e s s e m o s o m Chro 1
Mitosis üChromosomes are tightly coiled and visible üDivision of the sister chromatids-they separate üOnly occurs in eukaryotic cells üHas four stages üDoesn’t occur in some cells such as brain cells 2
How chromosomes move Microtubule organizing center Spindle fiber Separates sister chromatids Produce microtubule 3
Eukaryotic Mitotic Cell Division ü Used for growth and repair ü Produce 2 new cells ü Genetically identical to the original cell ü Cells are diploid or (2 n) ü 2 sets of chromosomes ü n= number of chromosomes What is the n for the organism? What is the 2 n for the organism? This organism has 2 pairs of chromosomes- paternal purple/pink maternal 4
Genetically identical to parent cell
Cell Cycle Animation Name each stage as you see it occur? 6
If an organism has 4 pairs of chromosomes and undergoes the cell cycle, how many chromosomes will each new daughter cell have? Draw it. What is n for the daughter cells? What is 2 n for the daughter cells?