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chromosomes are attached to what is known as the spindle fibre via the centromere. the centromere is normally towards the middle or the chromosome and is where the two sister chromotids join (so the centre of the x shape). the spindle fibre is made up of tubulin and is pulled to the poles of the cell (taking the chromosome with it) by the centrioles.
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What guide or pull chromosomes during mitosis?
The mitotic spindle, comprised of microtubules, guides and pulls chromosomes during mitosis. The spindle fibers attach to the centromeres of sister chromatids and help separate them to opposite poles of the cell during cell division.
What is anterior guidance?
Anterior guidance is the contact between the upper and lower front teeth that guides the movement of the lower jaw during activities like chewing and speaking. It helps maintain the stability and coordination of the jaw joints and muscles during function. Imbalances in anterior guidance can lead to issues like jaw pain or difficulty with jaw movements.
Why does telomerase need to have a built-in template for DNA synthesis?
Telomerase needs a built-in template for DNA synthesis because it uses this template to extend the telomeres, the repetitive DNA sequences at the ends of chromosomes. The telomerase enzyme adds specific DNA sequences to the ends of chromosomes to compensate for the natural loss of DNA that occurs during cell division. The built-in template guides the addition of these DNA sequences to maintain chromosome stability.
What is the biological determination system for the sex of an offspring?
The biological determination system for the sex of an offspring primarily relies on the combination of sex chromosomes contributed by the parents. In humans and many other animals, females typically have two X chromosomes (XX), while males have one X and one Y chromosome (XY). During reproduction, the mother always donates an X chromosome, while the father can donate either an X or a Y chromosome, determining the offspring's sex: XX results in a female, and XY results in a male. This chromosomal combination ultimately guides the development of sexual characteristics in the offspring.
What is the relationship between Honey guides and humans?
Honey guides are birds that have a symbiotic relationship with humans known as mutualism. They help humans find beehives in exchange for leftover honey and bee larvae that humans cannot access. Humans benefit from the honey guides' guidance, while the honey guides benefit from access to the beeswax combs.
What guide chromosomes during mitosis?
what guides the chromosomes movement during mitosis
What guide or pull chromosomes during mitosis?
The mitotic spindle, comprised of microtubules, guides and pulls chromosomes during mitosis. The spindle fibers attach to the centromeres of sister chromatids and help separate them to opposite poles of the cell during cell division.
Do spindle fibers form in plant cells undergoing mitosis?
Spindle fibers do not form in plant cells during mitosis. Plant cells undergo mitosis using a specialized structure called the phragmoplast, which helps in the formation of the cell plate during cytokinesis. The phragmoplast guides the deposition of new cell wall material between the daughter cells.
What is the function of chromosomes and why is it important?
Chromosomes function to package and organize DNA. They are important because they help protect DNA from mutations, their strucutre guides gene expression, they direct DNA damage response pathways, and they package DNA so that it can fit inside a cell and also so that it can be efficiently copied and segregated during replication.
Who guides an orchestra during performance?
The conductor.
State an example of a long-term movement?
The environmental movement and the women's movement are examples long-term movements. There is no single organization that controls or guides such movements.
What in the animal cell maintains order?
The nucleus maintains order in a cell. It consists of a nuclear envelope dotted with pores, a nucleolus which produces ribosomes, and chromatin, which contains chromosomes. The chromosomes have DNA, which guides the cell and tells it what to do.
Who is the founder of Girl guides association in France?
Antoinette Butte (founded the Movement in France)
What make possible the precise separation of DNA during cell division?
The mitotic spindle, made up of microtubules, plays a crucial role in separating DNA during cell division. The spindle apparatus attaches to chromosomes and guides them to opposite poles of the cell, ensuring each new cell receives a complete set of DNA. Protein complexes regulate spindle formation and chromosome movement to ensure accurate segregation of genetic material.
What are two things found in the nucleus of the cell?
Chromosomes and DNA are two things found in the nucleus of a cell. Chromosomes are structures composed of DNA and proteins, while DNA contains genetic information that guides cell function and inheritance.
How did mountain men help movement in the movement west?
They became the guides for the wagon trains. The men knew the passes and routes for the fastest best way to the west.
What do you call the person that guides the planes to their landing?
The person who guides planes to their landing is called a "ground controller" or "air traffic controller." They are responsible for ensuring the safe and efficient movement of aircraft on the ground and in the airspace around airports. Ground controllers use radar and communication systems to provide instructions to pilots during landing and takeoff procedures.
