[¦krō·mə‚sōm ‚kän·dən′sā·shən] (cell and molecular biology) The process whereby chromosomes become shorter and thicker during prophase as a consequence of coiling and supercoiling of chromatic strands.
What phase is condensation of chromosomes?
Chromatin condensation begins during prophase (2) and chromosomes become visible. Chromosomes remain condensed throughout the various stages of mitosis (2-5).
What is it called when condensed genetic material?
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.
What is meant by condensation and supercoiling of chromosomes?
DNA is temporarily packaged into a tightly wound and condensed chromosome prior to division (via supercoiling) … DNA is organised as chromosomes during the process of mitosis (condense in prophase, decondense in telophase)
What do we mean by condensation?
Condensation is the process where water vapor becomes liquid. It is the reverse of evaporation, where liquid water becomes a vapor. Condensation happens one of two ways: Either the air is cooled to its dew point or it becomes so saturated with water vapor that it cannot hold any more water.
How does chromosome condensation work?
Chromatin condensation is driven by condensins and interactions between histones. … Although already significantly compacted during interphase, upon entry into mitosis chromatin further condenses and individualizes to discrete chromosomes that are captured and moved independently by the mitotic spindle apparatus.
What metaphase means?
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.
How is DNA condensed to form chromosomes?
As shown in the animation, a DNA molecule wraps around histone proteins to form tight loops called nucleosomes. These nucleosomes coil and stack together to form fibers called chromatin. Chromatin, in turn, loops and folds with the help of additional proteins to form chromosomes.
What is chromatin Fibre?
Chromatin fibers are coiled and condensed to form chromosomes. Chromatin makes it possible for a number of cell processes to occur including DNA replication, transcription, DNA repair, genetic recombination, and cell division. Chromatin, Chromosomes and Chromatids.
What is the role of chromosome condensation in a eukaryotic cell?
Chromosome condensation is one of the major chromatin-remodeling events that occur during cell division. The changes in chromatin compaction and higher-order structure organization are essential requisites for ensuring a faithful transmission of the replicated genome to daughter cells.
Which of the following are essential to the condensation of chromosome are cells enter mitosis?
4. Which of the following are essential to the condensation of chromosomes as cells enter mitosis? Explanation: Cohesins are important immediately after replication.
How does chromatin condensation control gene activity?
The condensation level of chromatin is controlled by epigenetic modifications and associated regulatory factors and changes throughout differentiation and cell cycle progression. … Chromatin condensation modulates access and binding of nuclear proteins.