Multicellular animals--Man, for example--grow embryologically by Mitosisor Indirect Division.
As in Direct Division, typically, the nucleus in mitosis splits first and the cytoplasm secondly; but before the nucleus divides its content undergoes a series of changes.
Every phase of mitosis is subject to variation in different kinds of cells, but the outline of the division given here is the fundamental method.
You are sitting at the finish wire, which is mitosis (we chose mitosis because it is easy to recognize when the cell is observed with the aid of a microscope).
The process of cell division is known asmitosis and is diagrammed in Figure 6.
Our recent knowledge of the cell cycle has therefore led to a shift in the focus of investigation from mitosis to DNA synthesis.
Mitosis is a continuous process; the following stages of the process are designated only for convenience.
It is, in fact, the orderly sequence of metabolic events occurring in interphase that leads from one mitosisto the next.
Between one mitosis and the next, there can be an interval, from a few hours to several days in length, during which a cell is said to be in interphase.
In fact, in one classic book on histology,[8] while a description of mitosis required almost 12 pages, interphase was dismissed in less than six lines!
But on a planet like Almazin III where the radiation index is close to zero, the mitosis of the sarcoma cells stops abruptly, virus or no virus.
Since the atomic wars, the increased radioactivity of the earth undoubtedly stimulates mitosis of the malignant cells.
The mitosis was definitely decreasing the last time I checked you.
It passes into one of each pair of spermatocytes of the second order, persists during the rest stage, appears in the second mitosisas a dyad and then divides, going into one-half of the spermatids.
Prophase of mitosisin a young oogonium, showing 20 large chromosomes in two sections, a and b.
The spermatogonia contain a large nucleolus, which gradually disappears in the prophases of mitosis (plate VII, figs.
In mitosis or ordinary cell division, these chromosomes split lengthwise, so that the new cells always have the same number as the original one.
Each of these divides again by mitosis (the chromosomes splitting lengthwise), the half or haploid number remaining.
Figure 187 shows the metaphase of first spermatocyte mitosis with the unequal pair in metakinesis.
An early anaphase of this mitosis is shown in figure 19; here the small chromosome is already divided.
In Trirhabda virgata, the metaphase of a spermatogonial mitosis (plate VIII, fig.
As in all the beetles so far studied there is no rest stage between the two maturation divisions, but the late anaphase of the first mitosis passes over quickly into the second spindle.
An early prophase of the first maturation mitosis (fig.
In this species the unequal pair is more often found at a different level from the other chromosomes in the early metaphase of the first maturation mitosis (fig.
All of the evidence at hand leads to the conclusion that in the Coleoptera, the univalent elements of all the pairs, equal and unequal, separate in the first spermatocyte mitosis and divide quantitatively in the second.
The ordinary chromosomes assume the form of rings and crosses in the prophase of the first maturation mitosis (fig.
As in several of the forms studied, material was collected for examination of the somatic cells, but no favorable cases of mitosis were to be found.
In the first maturation mitosis it is attached to one pole of the spindle, does not divide, but goes to one of the two second spermatocytes (figs.
The heterotypic maturationmitosis in Amphibia and its general significance.
Synapsis must occur at the close of the last spermatogonial mitosis before the spireme is formed.
There are, however, serious objections to the interpretation of mitosis as an adaptation to ensure this equal distribution of the chromatin.
For the chromosomes of the heterotype mitosis arise by the looping round, not opening out, of the bivalent chromosomes.
This explanation is in harmony with the occurrence of typical mitosis in active tissue cells on the one hand, and of amitosis in the relatively quiescent primary germ cells on the other.
It is necessary, therefore, to seek for some other explanation of the elaborate mechanism of mitosisthan that which assumes it necessary for the equal distribution of the divided chromatin granules.
Trypanosoma and spermatozoa, in some cases even while the centrosome is functioning in mitosis (e.
On the other hand, the most elaborate mitosis occurs in cell-tissues (e.
Reference may be here made to Rosenberg's description (1904) of the heterotype mitosisin Drosera hybrids.
In yolk and white of egg the head of the spermatozoon underwent transformation into a nucleus, but no mitosis or aster formation was observed.
This increase is therefore reached at an earlier period in the larger wound since the process of mitosis is more rapid here.
The above list will hopefully give you a few useful examples demonstrating the appropriate usage of "mitosis" in a variety of sentences. We hope that you will now be able to make sentences using this word.
