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What are the network of nuclear threads composed of DNA and protein that condense to form chromosomes during mitosis is called?
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∙ 12y ago
Chromatin
Wiki User
∙ 12y ago
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Why not easy to observe individual chromosomes during the interphase?
coz in interphase, the chromatin threads are not yet condensed into what is called as chromosomes. they are thread like structures, and make a network called chromatin network. chromatin threads only begin to condense into thicker structures called chromosomes once the process of cell division actually begins
The phase of mitosis in which microtubules connect the centromere of each chromosome to the poles of the pindle?
The name for the network of microtubules along which the chromosomes move during cell division is called the spindle fibers. These spindle fibers attach to the chromosomes and pull them in half.
Why is it important the nuclear membrane disappears during mitosis?
A lot of things happen during mitosis. When the cell is OUT of mitosis, chromosomes are not discernible from each other ; the shapeless substance they form is called 'chromatin', and genes can be (and are) expressed at that stage. Then prior to mitosis, chromosomes duplicate (this is called the 'Replication'). During mitosis now : * Prophase: Chromosomes condense into the fully discernible "X-shaped" pairs that can be ordered by size. Each "X" is actually two identical chromosome molecules bound together ; genes are not expressed in this compact form. * Prometaphase: At that stage, the nuclear membrane disappears. // It is important because chromosomes are then accessible to the microtubules network. Actually two networks form, each from a center called centriole (one for each daughter cell, diametrically opposed on each side of the mother cell). // * Metaphase: The microtubule networks expand and bind to one of the molecules of each chromosome (each branch of the "X"). * Anaphase: When citokinesis occurs they contract, thus separating each chromosome molecule from its duplicate (hopefully one chromosome molecule of each pair going in each daughter cell). * Telophase: The nucleus membrane is then reformed in the daughter cells and chromosomes go back in chromatin form. Disclaimer : the disappearance of nucleic membrane is NOT common to all eukaryota (although it is for all animals). Some species perform the whole process with an intact nuclear membrane.
Which part of the cell unwinds to become chromosomes?
The chromatin network containing the DNA, which subsequently subsides, is responsible for the formation of chromosomal cells.
What are the six stages of mitosis?
h t t p ://library.thinkquest.org/C0118084/Gene/Chromosomal_Inheritance/StagesMitosis.htm ( Expired as of 2013) Interphase Prophase Metaphase Anaphase Telaphase Cytokinisis
What is the network of nuclear threads that condense to make chromosomes in mitosis called?
centromeres
Why not easy to observe individual chromosomes during the interphase?
coz in interphase, the chromatin threads are not yet condensed into what is called as chromosomes. they are thread like structures, and make a network called chromatin network. chromatin threads only begin to condense into thicker structures called chromosomes once the process of cell division actually begins
What is the stage of the cell cycle?
in mitosis eukaryotic cell nuclei divide to form two nuclei, each containing a comlete set of the cell's chromosomes. the firat event that takes place in mitosis is DNA replication. in this phase of mitosis the chromosomes are not yet visible because they are extended and uncoiled. the DNA of each chromosome is copied. each chromosome consists of two identical strands. the second event that takes place in mitosis is the prophase.this is where mitosis begins. the chromosomes coil into short, fat rods. the nuclear envelope breaks up. a network of protein cables called spindle fibers assembeles across the cell. the next step in mitosis is the metaphase. this is where the chromosomes attach to the spindle fibers and line up in the center of the cell. the fourth step in the process of mitosis is the anaphase. this is where each chromatid separates from its identical copy. then the chromosomes are reeled to opposite sides of the cell. then the spindle fibers begin to break down. next is the telophase. what happens in this part of mitosis is that each side of the cell now has a complete set of chromosomes. then the chromosomes will uncoil so proteins can be built. the spindle fibers dissappear. the last and final step in the peoccess of mitosis is the cytokinesis phase. in this phase of mitosis the cytoplasm is pinched in half ,forming two new cells. each newcell contains identical DNA. after growth and replication these cells may divide again.
The phase of mitosis in which microtubules connect the centromere of each chromosome to the poles of the pindle?
The name for the network of microtubules along which the chromosomes move during cell division is called the spindle fibers. These spindle fibers attach to the chromosomes and pull them in half.
What part unwinds to become chromosomes?
Chromatic network
Why is it important the nuclear membrane disappears during mitosis?
A lot of things happen during mitosis. When the cell is OUT of mitosis, chromosomes are not discernible from each other ; the shapeless substance they form is called 'chromatin', and genes can be (and are) expressed at that stage. Then prior to mitosis, chromosomes duplicate (this is called the 'Replication'). During mitosis now : * Prophase: Chromosomes condense into the fully discernible "X-shaped" pairs that can be ordered by size. Each "X" is actually two identical chromosome molecules bound together ; genes are not expressed in this compact form. * Prometaphase: At that stage, the nuclear membrane disappears. // It is important because chromosomes are then accessible to the microtubules network. Actually two networks form, each from a center called centriole (one for each daughter cell, diametrically opposed on each side of the mother cell). // * Metaphase: The microtubule networks expand and bind to one of the molecules of each chromosome (each branch of the "X"). * Anaphase: When citokinesis occurs they contract, thus separating each chromosome molecule from its duplicate (hopefully one chromosome molecule of each pair going in each daughter cell). * Telophase: The nucleus membrane is then reformed in the daughter cells and chromosomes go back in chromatin form. Disclaimer : the disappearance of nucleic membrane is NOT common to all eukaryota (although it is for all animals). Some species perform the whole process with an intact nuclear membrane.
Is oxygen an infinite network of atoms or composed of discrete molecules?
composed of dicrete molecules
Which part of the cell unwinds to become chromosomes?
The chromatin network containing the DNA, which subsequently subsides, is responsible for the formation of chromosomal cells.
What is a complicated network of protein fibers running through a cell?
chromosomes
Why is it typical to view a computer network as a cloud?
just like a cloud network is composed of layers.
The physical appearance of the entire set of chromosomes of a given animal is called a?
Chromatin Network
What is granulation tissue composed of?
clotted blood, fibroblasts, & extensive capillary network
