Comments on: Blog Feb. 5th

By: Elizabeth Sanders 1st period

Elizabeth Sanders 1st period — Mon, 01 Mar 2010 00:51:13 +0000

1.) G1 phase: The period prior to the synthesis of DNA. In this phase, the cell increases in mass in preparation for cell division. Note that the G in G1 represents gap and the 1 represents first, so the G1 phase is the first gap phase.

S phase: The period during which DNA is synthesized. In most cells, there is a narrow window of time during which DNA is synthesized. Note that the S represents synthesis.

G2 phase: The period after DNA synthesis has occurred but prior to the start of prophase. The cell synthesizes proteins and continues to increase in size. Note that the G in G2 represents gap and the 2 represents second, so the G2 phase is the second gap phase

By: Savannah Watson 2nd

Savannah Watson 2nd — Sun, 14 Feb 2010 13:51:22 +0000

prophase
Metaphase
Anaphase
Telophase

By: Ebone' Yarbrough

Ebone' Yarbrough — Thu, 11 Feb 2010 17:26:03 +0000

G1 phase: The period prior to the synthesis of DNA. In this phase, the cell increases in mass in preparation for cell division. Note that the G in G1 represents gap and the 1 represents first, so the G1 phase is the first gap phase.

S phase: The period during which DNA is synthesized. In most cells, there is a narrow window of time during which DNA is synthesized. Note that the S represents synthesis.

By: Logan Storey 6th period

Logan Storey 6th period — Thu, 11 Feb 2010 03:17:47 +0000

Interphase
DNA has replicated, but has not formed the condensed structure of chromosome. They remain as loosely coiled chromatin.The nuclear membrane is still intact to protect the DNA molecules from undergoing mutation.
Mitosis
Prophase
In prophase, the chromatin condenses into discrete chromosomes. The nuclear envelope breaks down and spindles form at opposite “poles” of the cell.
Metaphase
In metaphase, the chromosomes are aligned at the metaphase plate (a plane that is equally distant from the two spindle poles).
Anaphase
In anaphase, the paired chromosomes (sister chromatids) move to opposite ends of the cell.
Telophase
In this last stage, the chromosomes are cordoned off in distinct new nuclei in the emerging daughter cells. Cytokinesis is also occurring at this time.
At the end of mitosis, two distinct cells with identical genetic material are produced.

By: Nathan Davis For Feb 5th, 2010

Nathan Davis For Feb 5th, 2010 — Wed, 10 Feb 2010 21:04:23 +0000

The stages of interphase and mitosis:
The stages in which Mitosis is divided into are;
* Interphase- In this phase the cell prepares it’self for divison. Interphase is not a stage in Mitosis, it is just a phase of a cell cycle however it is important in Mitosis. Interphase is the stage of the cell or nucleus when it is not in mitosis, hence comprising most of the cell cycle. Before Mitosis it goes through this growth phase and spends most of it’s time here. G1, synthesis and G2 are the three phases here.
* Prophase- First nucleus membrane separates and becomes two. Chromosone divides into two forming an X
* Prometaphase- sometimes considered to be part of prophase, membrane completely breaks apart and microtubules start going inside the nuclear space. “open mitosis” seen in multicellular organisms not unicellular
* Metaphase- the spindle that was formed reaches the climax and the chromosomes start aligning themselves in a phase called Metaphase plane, which is at equal distance from the two poles of the spindle. It is here that the nuclear membrane completely disintegrates and the centrioles that are four in number place themselves in a set of two at the opposite poles. Polar fibers can still be found which extend across the length of the cell from one pole to the other. Chromosomes are at right angles to the spindle poles and are held by forces of the same level of polar fibers.
* Anaphase- chromosomes move to opposite ends of the nuclear.
* Telophase- Short phase which results in the formation of two cells each with one member of each homologous pair plus is still composed of two chromatids.

By: John Baudendistel - 4th Period

John Baudendistel - 4th Period — Wed, 10 Feb 2010 20:05:21 +0000

Interphase is where chromosomes and organelles are copied. Mitosis is where the cell divides.

By: Brady Purdin

Brady Purdin — Wed, 10 Feb 2010 16:57:56 +0000

Interphase occurs before mitosis and there are three phases: 1. G1 phase – cell increases in mass, 2. S phase – DNA is synthesizd. 3. G2 phase – The cell synthesizes protein and continues to increase in size.

By: TARRELL CLEMONS 1ST PERIOD 2-8-10

TARRELL CLEMONS 1ST PERIOD 2-8-10 — Tue, 09 Feb 2010 02:19:20 +0000

S phase: The period during which DNA is synthesized. In most cells, there is a narrow window of time during which DNA is synthesized. Note that the S represents synthesis.

By: austin 6per hoffman

austin 6per hoffman — Tue, 09 Feb 2010 01:08:48 +0000

g1phase= the cell inceases in mass

sphase= synthesised dna

g2phase cell synthesiszis protein and continues to increase in size

By: Andrew Patterson

Andrew Patterson — Tue, 09 Feb 2010 00:04:11 +0000

interphase