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Where is the region where the identical DNA molecules are most tightly attached to each other?
Identical DNA molecules are most tightly attached to each other at the region known as the centromere, which is located in the middle of the chromosome. The centromere plays a crucial role in cell division by providing the attachment site for spindle fibers during mitosis and meiosis.
What is the area where a pair of chromatids is attached is the?
The area where a pair of chromatids is attached is known as the centromere. It serves as the point of attachment for spindle fibers during cell division, allowing the chromatids to be pulled apart and distributed to daughter cells.
The two chromatid arms on a chromosome are what?
The two chromatid arms on a chromosome are known as sister chromatids, which are genetically identical copies created during DNA replication. Sister chromatids are joined at the centromere and are separated during cell division.
When the chromosomes make an exact copy of themselves what are they then called?
When chromosomes make an exact copy of themselves, they are called sister chromatids. Sister chromatids are identical copies of a chromosome that are held together by a structure called the centromere.
What guides the chromosomes movement during mitosis?
The spindle fibers, composed of microtubules, help guide the movement of chromosomes during mitosis. The microtubules attach to the centromere region of the chromosomes and pull them towards opposite poles of the cell. This ensures that each daughter cell receives the correct number of chromosomes.
Where is the region where the identical DNA molecules are most tightly attached to each other?
Identical DNA molecules are most tightly attached to each other at the region known as the centromere, which is located in the middle of the chromosome. The centromere plays a crucial role in cell division by providing the attachment site for spindle fibers during mitosis and meiosis.
What is the area where a pair of chromatids is attached is the?
The area where a pair of chromatids is attached is known as the centromere. It serves as the point of attachment for spindle fibers during cell division, allowing the chromatids to be pulled apart and distributed to daughter cells.
What are chromosomes that are of the same size and function and the centromere is at the same location yet are not homologous?
These are known as isochromosomes. They consist of two identical arms due to an abnormal chromosome division where the centromere is duplicated. Despite their similarity in size and centromere position, they lack the genetic diversity found in homologous chromosomes.
The two chromatid arms on a chromosome are what?
The two chromatid arms on a chromosome are known as sister chromatids, which are genetically identical copies created during DNA replication. Sister chromatids are joined at the centromere and are separated during cell division.
What is difference between chromosome and chromatids?
A chromatid is one-half of two identical copies of a replicated chromosome. During cell division, the identical copies are joined together at the region of the chromosome called the centromere. They are known as sister chromatids. Once the paired sister chromatids separate from one another in anaphase of mitosis, each is known as a daughter chromosome. [source: About.com/Biology, see link below]
A structure having two chromatids held together at a centromere?
This structure is called a chromosome. Chromosomes contain the genetic material of a cell and are replicated before cell division to ensure that each daughter cell receives a complete set of chromosomes. The two chromatids are identical copies of the same DNA molecule.
When the chromosomes make an exact copy of themselves what are they then called?
When chromosomes make an exact copy of themselves, they are called sister chromatids. Sister chromatids are identical copies of a chromosome that are held together by a structure called the centromere.
When does a chromosome consist of 2 identical chromatids?
A chromosome consists of 2 identical chromatids during the S phase of the cell cycle, after DNA replication has occurred. The two chromatids are known as sister chromatids and are held together by a structure called the centromere.
What is Beth's Cafe in Seattle known for?
Humongous portions
What guides the chromosomes movement during mitosis?
The spindle fibers, composed of microtubules, help guide the movement of chromosomes during mitosis. The microtubules attach to the centromere region of the chromosomes and pull them towards opposite poles of the cell. This ensures that each daughter cell receives the correct number of chromosomes.
What are the different types of chromosomes based on position of centromer?
The different types of chromosomes based on the position of centromere are(i) Metacentric : In this type of chromosome the centromere is present at the centre. All four arms of chromatids are equal in length.(2) Submetacentric : In this type of chromosome the centromere is situated slightly away from centre. So on one side two arms are long while another side two arms are short.(3) Acrocentric : In this type of chromosome the centromere is located near the end and hence two arms are very long while two arms are very short. Some times on the distal end of short arms the small filamentous structure is present which possesses a round structure on its lip. This part is known as satellite. The short filament which connects satellite with short arm is known as nucleolar organiser region.(4) Telocentric : In this type of chromosome the centromere is situated at the tip of chromosome and hence two arms are located only on one side.
Do chromatids form when DNA replicates prior to cell division?
Yes, chromatids form when DNA replicates prior to cell division. During the S phase of the cell cycle, each chromosome is duplicated, resulting in two identical copies called sister chromatids. These chromatids are connected at a region known as the centromere until they are separated during cell division. This process ensures that each daughter cell receives an identical set of chromosomes.
