Table of Contents
- 1 Which of the following are disc shaped structures present on the sides of the centromere?
- 2 What is the name of the structure that attaches to the centromere?
- 3 In which chromosome is the centromere possessing disc shaped structure?
- 4 What is the disc like shape present at the centromere region of chromosome called?
- 5 What are two chromatids together called?
- 6 Are chromosome carrying centromere at one end is called?
Which of the following are disc shaped structures present on the sides of the centromere?
kinetochores
On the side of each centromere, a disc-shaped structure called kinetochores (during mitosis the spindle fibers attached to the centromere via kinetochores) are present.
Which is the disc shaped structure?
In metaphase, discontinuous fibres radiate out from two spindle poles and get connected to the disc shaped structure at the surface of the centromere called kinetochores. These are called chromosome fibres or tractile fibrils.
What is the name of the structure that attaches to the centromere?
The centromere is the specialized DNA sequence of a chromosome that links a pair of sister chromatids (a dyad). During mitosis, spindle fibers attach to the centromere via the kinetochore.
What is kinetochores and its function?
In eukaryotes, the kinetochore is a proteinaceous multi-subunit assembly whose main function is to generate load-bearing attachments of sister chromatids (the replicated chromosomes held together by the protein complex cohesin) to spindle microtubules during cell division (mitosis or meiosis) (Figure 1A).
In which chromosome is the centromere possessing disc shaped structure?
Every chromosome consists of a primary constriction known as centromere that possesses a disc-shaped structure on its side called kinetochores. The centromere helps to divide the chromosome into two portions called chromosomes arms.
What occurs at the centromere?
The primary function of the centromere is to provide the foundation for assembly of the kinetochore, which is a protein complex essential to proper chromosomal segregation during mitosis. In electron micrographs of mitotic chromosomes, kinetochores appear as platelike structures composed of several layers (Figure 4).
What is the disc like shape present at the centromere region of chromosome called?
The centromere consists of two disk shaped bodies called kinetochores. The kinetochores do not form part of the chromatid but lie one on each side of the chromosome such that each chromatid is having its own kinetochore.
What are the two parts of cell division?
There are two types of cell division: mitosis and meiosis. Most of the time when people refer to “cell division,” they mean mitosis, the process of making new body cells.
What are two chromatids together called?
A pair of sister chromatids is called a dyad. Once sister chromatids have separated (during the anaphase of mitosis or the anaphase II of meiosis during sexual reproduction), they are again called chromosomes, each having the same genetic mass as one of the individual chromatids that made up its parent.
What is the main function of centromere?
The primary function of the centromere is to provide the foundation for assembly of the kinetochore, which is a protein complex essential to proper chromosomal segregation during mitosis.
Are chromosome carrying centromere at one end is called?
Chromosome carrying centromeres at one end is called telocentric. It is also known as terminal chromosome because centromere is present at the terminal end.