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Lil cell to large bull shark Development Project
How does one cell turn into a multicellular
Organism
We will use a bull shark as a example
Mitosis
Mitosis is a process were a cell replicates it self and DNA it also had multiple phases.Cells do this to either grow parts of the body or repair it securing or making a new structure over time
Inter-phase which is where a cell is doing their function
Pro-phase is were the nucleus is dissolving and the spindle
fiber are growing and pushing themselves to opposite sides of the cell
Pro meta-phase is where the Spindle fibers are on the opposite sides and are connecting to the chromosomes and the cell membrane are almost dissolved away
Meta-phase is where The Spindle Fibers have pulled the
chromosomes to the center and formed a meta phase plate
Ana-phase is where the spindle fiber have teared apart the chromosomes and are being Pulled into the opposite sides Of the cell
Tele-phase Is where the cells are splitting apart and taking a equal amount of chromosomes with them and are forming a new nucleus and the spindle fibers are dissolving and the cell is pinching in the center
Cytokinesis is where The cells are split and are pinched closed and the D.N.A are being unraveled and are going to do Interphase
Mitosis is a part of a cell cycle and is a small part of it
DNA and DNA replication and Cell cycle
DNA is the blueprints of the cells it contains the instructions needed for an cell to complete its task and reproduce. DNA is replicated during inter-phase its copied which is the phase that is occurring most of the time. The first step of the cycle is G1-Phase where the cell grows and has a single copy of each chromosome then S-Phase where DNA is replicated by having a copy of each 23 pairs of the 46 chromosomes G2 phase is preparing for mitosis so that no cancer cells are made and replicated and during as the pairs are pulled apart the copied strand and the opposite original strand is paired together replicating a new chromosome with the same amount total chromosomes and when cytokenisis separates the cells each has a equal number of cells
DNA and DNA replication
Cell Differentiation
How do cells differentiate if there from different cells simple the genes turned on or off. Genes are roughly individual traits of a cell like size, function, shape etc they differentiate by having the gene be turned on or off (suppressed or expressed) for example when mitosis is done accruing 2 cells are made one cell can be exactly the same as the original and the second can express a different gene for shape to become a muscle cell. Same DNA different cell