Mitosis is easily observed in cells that are growing at a rapid pace such as whitefish blastula or onion root tips, which was used in this lab experiment. The root tips contain and area called the apical meristem that has the highest percentage of cells undergoing mitosis. The whitefish blastula is formed directly after the egg is fertilized. This is a period of rapid growth and numerous cellular divisions where mitosis can be observed. In mitosis the cell is in interphase, and have a distinct nucleus and nucleoli where the thin threads of chromatin thicken into distinct chromosomes and the nuclear evvelope breaks open releasing them into the cytoplasm. The firs signs of the spindle begin to appear, next the cell begins metaphase, where the spindle attaches to the Centromere of each chromosome and moves them to the same level in the middle of the cell. This level position is called the metaphase plate. Anaphase begins when the chromatids are separated and pulled to opposite poles, then the final stage is telophase. The nuclear envelope is reformed and the chromosomes gradually uncoil. Cytokinesis may occur, in which, a cleavage furrow will form and the two daughter cells will separate. Meiosis is more complex and involves two nuclear divisions. The…
5) Mitosis and meiosis are alike in the respect that go through most of the same phases, and are used for reproduction purposes. However, meiosis results in sexual reproduction, in order to create multicellular organisms, occurring in only animals, humans, fungi, and plants, whereas mitosis occurs in all organisms. Mitosis only goes through one division, has the same number of chromosomes, and creates only two diploid cells. Meiosis undergoes two divisions, the creation of four haploid cells, and half reduces the chromosomes.…
The chromosomes replicate and each DNA strand unzips into two strands, while free floating bases attach to the strands. Chromosomes begin to condense and attach to the membrane of the nucleus pairing up with their corresponding chromosome. Enzymes cut the DNA from the chromosomes at this time. The spindle fibers from and centrioles begin to separate to opposite ends. The chromosomes will now line up on either side of the metaphase plate. The chromosomes split to other ends of the cell. New nuclear membranes form at other ends of the cell. The rest of the cell divides and the division of the cell's cytoplasm has occurred. The chromosomes condense again, spindles and centrioles form, and membrane fragments disperse. Spindle fibers attach to the chromosomes. Centrioles are at opposite ends. Fibers are pulled to opposite ends of the cell. Chromatids arrive at opposite ends and new nuclear membranes form. The rest of the cell continues to divide and there are now four daughter cells. Following these steps of meiosis will help us be able to have a better understanding and awareness of who the parents are of Mrs.…
Mitosis is a process in which cells replicate their DNA to create new cells that are genetically identical. The DNA is propagated throughout the new cells and the genetic information is “immortalized”.…
Meiosis is the process of cell division in which gametes are produced. It results in four haploid (IN) cells from two diploid (2N) cells (Cyr). In meiosis I, crossing over and independent assortment of the chromosomes occur. These two processes increase the genetic variation within the cell either benefiting or hurting the cell’s ability to adapt (natural selection). After these two events have occurred, the chromosomes will then proceed through all four stages and produce two daughter cells (Cyr). In meiosis II, the two daughter cells each again proceed…
Response Feedback: Meiosis occurs only in replicating gametes or reproducing cells. In phase one, the number of chromosomes is reduced by half but the chromatid pairs remain together. In phase two, the chromatids split apart forming four daughter cells. Non-germ cells such as red blood cells or skin cells undergo mitosis.For more information on this topic, consult:Carol Mattson Porth and Glen Matfin, Pathophysiology, 8th Edition, page(s) 122-123, 123fCarol Mattson Porth, Essentials of Pathophysiology, 2nd Edition, page(s) 52-53, 53f Elizabeth J. Corwin, Handbook of Pathophysiology, 3rd Edition, page(s) 15-16Pathophysiology Made Incredibly Easy, 4th Edition, page(s) 436Anatomy and Physiology Made Incredibly Visual, page(s) 11Animation(s) Cell Cycle…
On the other hand, there are many contrasts such that there is only one cell division in mitosis as there is two cell divisions in meiosis. These phases are called meiosis one and meiosis two. Another contrast is that mitosis produces only two daughter cells whereas meiosis produces four haploid daughter cells. These daughter cells come out exactly the same in mitosis but not in meiosis because the chromosomes exchange DNA strips with one another and four daughter cells are produced to mix the DNA. Typically, mitosis is a form of reproduction in prokaryotic organisms because they only have one cell whereas meiosis is a form of reproduction in eukaryotic organisms because they have many cells. In other words, mitosis is a form of asexual reproduction where one cell splits and forms two new cells and meiosis is a form of sexual reproduction that requires the union of a sperm and egg for this process to occur.…
Mitosis and meiosis can be seen with light microscopes. the different stages of mitosis; when the spindle fibers are formed in Prophase, the chromosomes lining up along the middle of the cell in Metaphase, the chromatids separating and moving to opposite sides of the cell in Anaphase and finally the cytoplasm splitting into 2 genetically identical daughter cells in Telophase.…
Meiosis is the process by which cells divide and create living creatures. Without meiosis we cannot have the process of mitosis, which is the process by which cells of tissue are created for living creatures. When meiosis occurs 4 daughter cells are created, while only 2 are created in mitosis. With the creation of 2 daughter cells the new cells will be similar to the parent cell, but will have differences, as there more parent cells involved. When mitosis occurs the daughter cells will be identical to the parent cell, since only 1 cell is involved. Meiosis is needed for sexual reproduction, while mitosis is needed for general growth, repair, and cellular reproduction of the body. The process of mitosis is not involved in any sex cell, and meiosis is not involved in any cell with the exception of sex cells. Since meiosis has more cells involved (parent cells) this process has a few more steps than what mitosis does. There are several similarities between the process of mitosis and meiosis. For example both processes occur at the cellular level. Both processes share genetic material from the parent cell to the daughter cell. In conclusion without meiosis we would not be created and therefore not need the process of meiosis, because cells would not be able to form.…
2. In 2-4 sentences compare and contrast mitosis and meiosis including the steps, purpose and products. Mitosis and meiosis are types of nuclear division that make different types of cells. Mitosis makes diploid cells that are genetically identical. It takes place throughout an organism’s lifetime and is involved in asexual reproduction. During meiosis, diploid cells undergo 2 cell divisions that result in 4 haploid cells. Meiosis occurs in sex cells, produces gametes, increases genetic diversity and produces genetically unique cells. It takes place only at certain times in an organism’s life cycle and is involved in sexual reproduction.…
There is two stages in M-phase; the first stage is called mitosis. Mitosis is the nuclear division of the cell, separating the two copies of the genome and forming daughter nuclei. There are four stages in mitosis: prophase, metaphase, anaphase and telophase. Multiple changes occur in prophase including the coiling of the chromatin into chromosomes, the disappearance of the nuclear envelope and nucleoli, the migration of the centrosomes toward opposite poles and the construction of spindle apparatus, which are composed of protein fibers called microtubules. The next stage is called metaphase, where the chromosomes line up at the middle of the cell because the microtubules push and pull them there. The third stage, anaphase, consists of sister chromatids separating and being pulled toward opposite poles. The last phase of mitosis is telophase, which is when the chromosomes uncoil resulting in chromatin. During telophase two new nuclear enveloped appear and spindle apparatus breaks down (Mrs. Weiland, 11/19/15).…
Puppies increase in size as their cells grow and divide. Almost all cells complete a full cell cycle that includes interphase and cell division. In interphase, cells serve their specialized functions, grow, and copy their genetic material. Mitosis is the first stage of cell division, in which the copied chromosomes are separated into two new nuclei. Then in cytokinesis the cell divides into two daughter cells. If no mutations or errors occur, the genetic material in each daughter cell is identical to what was in the original cell.…
Mitosis, results in identical cells. 46 chromosomes. It is important for: maintenance, repair, growth, and regeneration. The phases of mitosis are prophase, metaphase, anaphase and telophase.…
Mitosis and meiosis are important, because mitosis is a type of sexual reproduction which enables a cell to reproduce two new genetically identical daughter cells from a single parent cell (Pruitt and Underwood, 2006). During this process mitosis has the function of permitting cells to replace ones that are worn out, damaged, or need to be replicated for single cells organism. Where mitosis is asexual cellular reproduction, meiosis not only multiplying the numbers of cells by cell division, but it reduces the number of chromosomes in each daughter cell to one-half of the number before meiosis (Pruitt and Underwood, 2006). Meiosis also permits chromosomes of more complex organisms to be passed down from parent cells to daughter cells for genetic diversity.…
Meiosis is extremely critical because its job is to check that all species produced by sexual reproduction include the right number of chromosomes we should have. This activity decreases the number of chromosomes in half, permitting the sexual reproduction process to prevail. Because meiosis produces cells that eventually becomes reproductive cells, this division in chromosome number is critical to the cell cycle. Without this process, the combination of two gametes during fertilization would result in an offspring with double the number of chromosomes it should have! This could lead to the death of the cell or maybe create a life threatening disorder with the offspring. This is how meiosis preserves the right chromosome number during our reproduction process. With it we can create healthy normal babies with a clean bill of health.…