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.
When can we see chromosomes in cell?
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.
When can we see chromatin material and chromosomes in a cell class 9?
During cell division, the chromatin material in the cell condenses to form chromosomes. These are visible under the microscope when stained.
What phase Can you see chromatin?
Prophase is the first phase of mitosis, the process that separates the duplicated genetic material carried in the nucleus of a parent cell into two identical daughter cells. During prophase, the complex of DNA and proteins contained in the nucleus, known as chromatin, condenses.
Where can you find chromosome and chromatin?
Chromatin is located in the nucleus of our cell. It is composed of DNA and proteins that condense to form chromosomes. … The histone proteins organize the DNA into special structures called nucleosomes. The nucleosome further folds to form a chromatin fibre.
At what part of the cell cycle would you see a chromosome that looks like this?
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).
How can chromosomes be identified?
Chromosomes can be identified by their size, centromere position and a specific banding pattern. Chromosomes are most distinct during the metaphase stage of cell division. A karyotype is a collection of chromosomes of a species. Karyotyping is done to ascertain the chromosomal disorders.
Can we see chromatin?
Chromatin is a complex of DNA and proteins that forms chromosomes within the nucleus of eukaryotic cells. … During cell division, the structure of the chromatin and chromosomes are visible under a light microscope, and they change in shape as the DNA is duplicated and separated into two cells.
What are chromosomes and chromatin material Class 9?
Chromatin is a complex formed by histones packaging the DNA double helix. Chromosomes are structures of proteins and nucleic acids found in the living cells and carry genetic material. Chromatin is composed of nucleosomes. Chromosomes are composed of condensed chromatin fibers.
What is chromatin material and how does it changes just before the cell division Class 9?
Chromatin material is a mass of genetic material consisting of DNA and histone proteins. Before the cell divides,the chromatin material packages itself more tightly for facilitation of segregation of the chromosomes.
During which phase do the following occur appear condensation of chromatin to form chromosomes detectable with a dye and microscopic examination?
Chromotid replicates into two halves held together by a centromere. After these sister chromatids are formed, the next phase of the cell cycle proceeds; this is prophase, when chromatin condenses into chromosomes to the point where sister chromatids can be seen under a light microscope.
At which stage in the cell cycle the chromatin is synthesized?
S phase (Synthesis Phase) is the phase of the cell cycle in which DNA is replicated, occurring between G1 phase and G2 phase. Since accurate duplication of the genome is critical to successful cell division, the processes that occur during S-phase are tightly regulated and widely conserved.
Are chromosomes condensed in G1?
In eukaryotic cells, the DNA is packaged with proteins in the nucleus, and varies in structure and appearance at different parts of the cell cycle. Chromosomes condense and become visible by light microscopy as eukaryotic cells enter mitosis or meiosis. … In G1, each chromosome is a single chromatid.