chapter 12.rtf - HCC Learning Web
... MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 1) If cells in the process of dividing are subjected to colchicine, a drug that interferes with the formation of the spindle apparatus, at which stage will mitosis be arrested? A) anaphase B) inter ...
... MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 1) If cells in the process of dividing are subjected to colchicine, a drug that interferes with the formation of the spindle apparatus, at which stage will mitosis be arrested? A) anaphase B) inter ...
Mitosis Flip Book
... The spindle fibres tug the X shaped chromosomes into a line across the middle of the cell. ...
... The spindle fibres tug the X shaped chromosomes into a line across the middle of the cell. ...
Adv. Bio. Ch 12 Mitosis
... separate, and the now-daughter chromosomes begin moving toward opposite poles of the cell due to the action of the spindle. • Depending where the centromere is located along the chromosome, a characteristic shape appears during chromosome movement. The two shown above give V and J shapes. • At the e ...
... separate, and the now-daughter chromosomes begin moving toward opposite poles of the cell due to the action of the spindle. • Depending where the centromere is located along the chromosome, a characteristic shape appears during chromosome movement. The two shown above give V and J shapes. • At the e ...
Lec.14 Dr:Buthaina Al-Sabawi Date:21/12/2016 Mitosis
... composed of a protein called actin around the center of the cell contracts pinching the cell into two daughter cells, each with one nucleus. In plant cells, the rigid wall requires that a cell plate be synthesized between the ...
... composed of a protein called actin around the center of the cell contracts pinching the cell into two daughter cells, each with one nucleus. In plant cells, the rigid wall requires that a cell plate be synthesized between the ...
Mitosis - Mahopac Voyagers!
... Illustration of the process by which somatic cells multiply and divide. Mitosis is a process of cell division which results in the production of two daughter cells from a single parent cell. The daughter cells are identical to one another and to the original parent cell. In a typical animal cell, mi ...
... Illustration of the process by which somatic cells multiply and divide. Mitosis is a process of cell division which results in the production of two daughter cells from a single parent cell. The daughter cells are identical to one another and to the original parent cell. In a typical animal cell, mi ...
Mitosis: Labeled Diagram
... Illustration of the process by which somatic cells multiply and divide. Mitosis is a process of cell division which results in the production of two daughter cells from a single parent cell. The daughter cells are identical to one another and to the original parent cell. In a typical animal cell, mi ...
... Illustration of the process by which somatic cells multiply and divide. Mitosis is a process of cell division which results in the production of two daughter cells from a single parent cell. The daughter cells are identical to one another and to the original parent cell. In a typical animal cell, mi ...
Document
... eggs have none. The sperm's centrioles are absolutely essential for forming a centrosome which will form a spindle enabling the first division of the zygote to take place. ...
... eggs have none. The sperm's centrioles are absolutely essential for forming a centrosome which will form a spindle enabling the first division of the zygote to take place. ...
Cell Cycle part 2 - Fort Thomas Independent Schools
... and one difference between the two processes. In addition, explain the evolution link between the two processes. (5 Points) ...
... and one difference between the two processes. In addition, explain the evolution link between the two processes. (5 Points) ...
Check answers
... INTERPHASE = (Nondividing phase of cell cycle) Growth; Cell is doing its job Includes G1, S, G2 Nuclear envelope/nucleoli are visible DNA is less condensed as chromatin S- DNA makes copy G2- Make organelles needed for new cell (EX: Centrosomes/centrioles are copied ) PROPHASE (1st dividing phase) Ch ...
... INTERPHASE = (Nondividing phase of cell cycle) Growth; Cell is doing its job Includes G1, S, G2 Nuclear envelope/nucleoli are visible DNA is less condensed as chromatin S- DNA makes copy G2- Make organelles needed for new cell (EX: Centrosomes/centrioles are copied ) PROPHASE (1st dividing phase) Ch ...
The drug colchicine inhibits the formation of spindle fibers. If you
... The drug colchicine inhibits the formation of spindle fibers. If you treat dividing cells with colchicine, what would you expect the result to be? A ...
... The drug colchicine inhibits the formation of spindle fibers. If you treat dividing cells with colchicine, what would you expect the result to be? A ...
MS Word worksheet
... How does the nature of chromatin change at the end of the mitotic phase (extent of packing)? ...
... How does the nature of chromatin change at the end of the mitotic phase (extent of packing)? ...
How Do Cells Divide? 1. Regarding the mitotic phase of the cell
... How does its length compare to the S phase of the cycle? What are the two major events that occur during the mitotic phase? What "choices" does a cell have at the end of the mitotic phase? How does the nature of chromatin change at the end of the mitotic phase (extent of packing)? 2. Indicate the lo ...
... How does its length compare to the S phase of the cycle? What are the two major events that occur during the mitotic phase? What "choices" does a cell have at the end of the mitotic phase? How does the nature of chromatin change at the end of the mitotic phase (extent of packing)? 2. Indicate the lo ...
Stages of Mitosis
... Metaphase plate – Plane that is equidistant from both of the spindles’ poles ...
... Metaphase plate – Plane that is equidistant from both of the spindles’ poles ...
Kinetochore
The kinetochore /kɪˈnɛtəkɔər/ is the protein structure on chromatids where the spindle fibers attach during cell division to pull sister chromatids apart.The kinetochore forms in eukaryotes, assembles on the centromere and links the chromosome to microtubule polymers from the mitotic spindle during mitosis and meiosis.""Monocentric"" organisms, including vertebrates, fungi, and most plants, have a single centromeric region on each chromosome which assembles one kinetochore. ""Holocentric"" organisms, such as nematodes and some plants, assemble a kinetochore along the entire length of a chromosome.The kinetochore contains two regions: an inner kinetochore, which is tightly associated with the centromere DNA, assembled in a specialized form of chromatin persistent throughout the cell cycle; an outer kinetochore, which interacts with microtubules; the outer kinetochore is a very dynamic structure, with many identical components, which are assembled and functional only during cell division.Kinetochores start, control and supervise the striking movements of chromosomes during cell division. During mitosis, which occurs after chromosomes are duplicated during S phase, two sister chromatids are held together each with its own kinetochore which face in opposing directions and attach to opposite poles of the mitotic spindle. Following the transition from metaphase to anaphase, the sister chromatids separate from each other, and the individual kinetochores on each chromatid drive their movement to the spindle poles that will define the two new daughter cells. Thus, the kinetochore is essential for the chromosome segregation that is classically associated with mitosis and meiosis.Even the simplest kinetochores consist of more than 19 different proteins. Many of these proteins are conserved between eukaryotic species, including a specialized histone H3 variant (called CENP-A or CenH3) which helps the kinetochore associate with DNA. Other proteins in the kinetochore attach it to the microtubules (MTs) of the mitotic spindle. There are also motor proteins, including both dynein and kinesin, which generate forces that move chromosomes during mitosis. Other proteins, such as MAD2 monitor the microtubule attachment as well as the tension between sister kinetochores and activate the spindle checkpoint to arrest the cell cycle when either of these is absent.In summary, kinetochore functions include anchoring of chromosomes to MTs in the spindle, verification of anchoring, activation of the spindle checkpoint and participation in force generation to propel chromosome movement during cell division.On the other hand, MTs are metastable polymers made of α- and β-tubulin, alternating between growing and shrinking phases, a phenomenon known as ""dynamic instability"". MTs are highly dynamic structures, whose behavior is integrated with kinetochore function to control chromosome movement and segregation.