Complete answer: The cell component visible only during cell division is the chromosome. In a nondividing cell, the genetic material that is known as DNA is present as chromatin fibers. … Since, during cellular division, chromosomes are highly condensed, they’re visible under a microscope.
What stage would chromosomes be visible?
Metaphase is a stage in the cell cycle where all the genetic material is condensing into chromosomes. These chromosomes then become visible. During this stage, the nucleus disappears and the chromosomes appear in the cytoplasm of the cell.
Are chromosomes always visible in a cell explain?
Chromosomes are not always visible. They usually sit around uncoiled and as loose strands called chromatin. When it is time for the cell to reproduce, they condense and wrap up very tightly. The tightly wound DNA is the chromosome.
Are chromosomes visible in most cells except during cell division?
Chromosomes are not visible in most cells except during cell division. 2. … Each chromosome consists of two identical sister chromatids.
Are chromosomes only visible when they are being replicated?
Once the chromosomes have replicated, the nucleus divides by mitosis. During interphase, cellular organelles double in number, the DNA replicates, and protein synthesis occurs. The chromosomes are not visible and the DNA appears as uncoiled chromatin.
Why do chromosomes only become visible as a cell goes into mitosis?
During interphase (1), chromatin is in its least condensed state and appears loosely distributed throughout the nucleus. Chromatin condensation begins during prophase (2) and chromosomes become visible. Chromosomes remain condensed throughout the various stages of mitosis (2-5).
What phase do chromosomes become invisible?
Interphase. If a cell is not undergoing mitotic cell division, the cell is in interphase. In this phase, the chromosomes are invisible through a light microscope.
Can chromosomes be seen in non dividing cells?
When cells are not dividing, you cannot see the chromosomes, and the nucleus looks like this photograph of a cell seen under the microscope where you can see the nuclear membrane surrounding a salmon pink area. At this stage, the chromosomes are not visible – just this mass of nuclear material called chromatin.
Why are chromosomes not usually visible in non dividing cells?
Chromosomes are not visible in the cell’s nucleus—not even under a microscope—when the cell is not dividing. However, the DNA that makes up chromosomes becomes more tightly packed during cell division and is then visible under a microscope. … DNA and histone proteins are packaged into structures called chromosomes.
Why can’t chromosomes be seen in non dividing cells?
During most of the cell cycle, interphase, the chromosomes are somewhat less condensed and are not visible as individual objects under the light microscope. However during cell division, mitosis, the chromosomes become highly condensed and are then visible as dark distinct bodies within the nuclei of cells.
When chromosomes become visible at the beginning of cell division What does each chromosome consist of quizlet?
At the beginning of cell division, each chromosome consists of two identical sister chromatids.
Why are chromosomes not visible in most cells until they begin to prepare for cell division?
Interphase: Each chromosome undergoes replication, making an identical copy of itself. At this point, the chromosomes are still long and thin, and are not visible inside the nucleus. Cells spend most of their life in this non-dividing phase. See the graphic below.
What occurs in cell division?
Most of the time when people refer to “cell division,” they mean mitosis, the process of making new body cells. Meiosis is the type of cell division that creates egg and sperm cells. … During mitosis, a cell duplicates all of its contents, including its chromosomes, and splits to form two identical daughter cells.
Are chromosomes now visible during prophase?
When prophase begins, the DNA molecules are progressively shortened and condensed by coiling, to form visible chromosomes. Enzymes during prophase break down the nuclear membrane and nucleolus so they are no longer visible.
Which of the following does not occur during mitosis?
Explanation: Crossing over is the only answer choice that does not occur during mitosis. Crossing over occurs during prophase I of meiosis and involves swapping of genetic information between homologous chromosomes.
What is a replicated chromosome?
A replicated chromosome (or equivalently, a duplicated chromosome) contains two identical chromatids, also called sister chromatids. The difference between a duplicated chromosome and a chromatid, strictly speaking, is that a chromosome contains two chromatids that are joined at a structure called a centromere.