#PROPHASE EXAMPLE SKIN#

In preparation for telophase, the two cell poles also move further apart during the course of anaphase.The daughter chromosomes migrate centromere first and the kinetochore fibers become shorter as the chromosomes near a pole..Through the spindle apparatus, the daughter chromosomes move to the poles at opposite ends of the cell..During prophase, they separate to provide microtubule centers in each new cell. This organelle controls the microtubules in the cell, and each centriole is one half of the organelle. They are referred to as daughter chromosomes. Prophase, in both mitosis and meiosis, is recognized by the condensing of chromosomes and separation of the centrioles in the centrosome. Once the paired sister chromatids separate from one another, each is considered a 'full' chromosome.The paired centromeres in each distinct chromosome begin to move apart..During anaphase, the following key changes occur: At the end of anaphase, each pole contains a complete compilation of chromosomes. Spindle fibers not connected to chromatids lengthen and elongate the cell. In anaphase, the paired chromosomes ( sister chromatids) separate and begin moving to opposite ends (poles) of the cell. The chromosomes begin to migrate toward the cell center.Spindle fibers also form in prophase which will attach to the chromosomes.

#PROPHASE EXAMPLE SKIN#

The kinetochore fibers 'interact' with the spindle polar fibers connecting the kinetochores to the polar fibers. For example, human skin cells, which divide about once a day, spend roughly.

Kinetochores, which are specialized regions in the centromeres of chromosomes, attach to a type of microtubule called kinetochore fibers.

Polar fibers, which are microtubules that make up the spindle fibers, reach from each cell pole to the cell's equator.

The two pairs of centrioles (formed from the replication of one pair in Interphase) move away from one another toward opposite ends of the cell due to the lengthening of the microtubules that form between them.

The mitotic spindle, composed of microtubules and proteins, forms in the cytoplasm.

Chromatin fibers become coiled into chromosomes, with each chromosome having two chromatids joined at a centromere.In mitosis, prophase, metaphase, anaphase and telophase occur once. The first round of division is special, but the second round is more like mitosis. In meiosis, prophase, metaphase, anaphase and telophase occur twice. During prophase, a number of important changes occur: Meiosis and mitosis both have a prophase, metaphase, anaphase, telophase and cytokinesis. Prophase (versus interphase) is the first true step of the mitotic process. The nuclear envelope breaks down and spindles form at opposite poles of the cell. In prophase, the chromatin condenses into discrete chromosomes.

Prophase example