can someone summerize the 4 steps of miosis in the shortest way for each if thats possible? thanks so much i have to know them for my midterm and in my book its so long and i dont understand. THANKS!!!!!!!!!!!
2007-01-21 08:11:36 · 4 answers · asked by Anonymous in Science & Mathematics ➔ Biology
just remember: PMAT.
Prophase: nucleoli dissapear, chromatin uncoil, spindle microtubules break nuclear envelope into fragments, chromosomes coil into chromosomes
Metaphase: chromosomes line up on the metaphase plate. spindles move to the opposite poles of the cell
Anaphase: the microtubules on the chromosomes pull them apart and pull them to the spindles
Telophase: the nuclear envelope reforms and the cytoplasm divides (cytoknesis) and so does the cell into 2 daughter cells
2007-01-21 08:23:26 · answer #1 · answered by ♪寿司人♫ 3 · 1⤊ 1⤋
Mitosis -
Interphase - Point at which cell is preparing to start dividing, the chromosomes are still strung and sped out.
Prophase - This is when the Chromosomes start to condense, centrioles and microtubules start to move to opposite sides of the cell. Nuclear envelope (thingy that holds the chromosomes) starts to break apart.
Metaphase - Chromosomes line up in the middle of the cell and microtubules connect the chromosomes to the centrioles.
Anaphase - Chromosomes are split, and the microtubules pull the split parts to opposite sites of the cell.
Telephase - The cells begin to split. A cleavage furrow is what makes them split, it makes the cell membrane in the middle of the cell pinch together which forms two separate cells. Also the nuclear envelope begins to form in each of the separate cells as the split.
In a plant cell, instead of a cleavage furrow, a cell plate forms from the inside out and splits the two cells.
If you want a little more detail, just ask.
2007-01-21 08:46:41 · answer #2 · answered by abacus314 3 · 0⤊ 0⤋
Prophase - chromosomes condense
Metaphase - chromosomes line up across the equator
Anaphase - chromosomes move to opposite poles of the cell
Telophase - nuclear membranes form and cell divides
Now, that is an increddibly basic rundown of the process. If it is for an exam of any importance i suggest learning what it says in your book. There are a lot of details to mitosis not included above.
2007-01-21 08:26:04 · answer #3 · answered by Alasdair S 2 · 1⤊ 0⤋
Prophase- -Chromatin turns into chromosome
-Nucleus and nucleur membrane dissappear
- Spindle fibres are formed and attached to the
centromere( middle of chromosome sticky part)
Metaphase- Chromosomes line up aganist the middle of the cell (cell equator) in single file
Anaphase- Double stranded chromosomes separate from eachother and become sister chromatids (single stranded chromosomes) because the spindle fibres are contracting and shortening so they get pulled apart.
Telophase- Nucleus and nucleur membrane reappear. spindle fibres dissappear. chromosomes change back into chromatin. 2 new cells are formed. they go through cytokenisis (the process by which nuclear material is divided equally into 2) cleavage furrow is formed.
2007-01-21 08:52:42 · answer #4 · answered by nilo 3 · 0⤊ 0⤋