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It is possible to count chromosomes only during vell division (mitosis or meiosis). This is because when the cell is not dividing the chromosomes are in an uncoiled, extended state and are not visible under the microscope. During cell division the chromosomes coil up, becoming shorter and thicker and so visible. At this time they can be counted.
What else can I help you with?
What cellular process would be directly affected by a catalyst that blocked a certain step in the separation of chromosomes?
The cellular process affected would be cell division, specifically during the phase of mitosis where the chromosomes need to separate into two daughter cells. Hindering this process could lead to cells with an abnormal number of chromosomes, causing genetic instability and potentially leading to cell death or mutation.
Why does the nuclear membrane need to disappear during prophase?
The nuclear membrane needs to disappear during prophase to facilitate the proper alignment and separation of chromosomes during cell division. By disintegrating, it allows spindle fibers to access the chromosomes, ensuring they can attach to the kinetochores and be effectively pulled apart during later stages of mitosis. This disappearance is crucial for the accurate distribution of genetic material to the daughter cells.
Why is DNA spread out during interphase?
So transcription factors and RNA polymerase have access to it to induce transcription. DNA that is not transcribed in a particular cell (e.g. hemoglobin gene in nerve cells) is not unraveled as much and remains as tightly packed heterochromatin. The parts of your DNA that are actively transcribed unravel the most and are called euchromatin.
Why cant sex cells form by mitosis?
if I'm not mistaken I'm pretty sure its that sperm cells and the egg. (gamete's)each have around 23 chromosomes each. and a skin cell already has 46 chromosomes.so mitosis wouldn't be able to happen.well at least that's what i think.
Why do you need to use oceto orcein in mitosis?
Oceto orcein is a stain commonly used in mitosis studies because it helps to visualize chromosomal structures. Specifically, it stains chromosomes, highlighting their shape, size, and number, making it easier to observe and analyze mitotic division. It enhances contrast and allows for better identification and characterization of various stages of mitosis.
When random assortment of chromosomes IN MITOSIS?
Random assortment of chromosomes occurs during metaphase of mitosis when homologous chromosomes line up randomly along the metaphase plate. This process leads to genetic diversity in the daughter cells produced as each cell receives a unique combination of chromosomes.
What do chromosomes do before mitosis?
Before mitosis begins, the chromosomes in a cell replicate. This occurs during the S (synthesis) phase. Chromosomes need to replicate so that when the cell divides at the end of mitosis, the daughter cells each recieve a copy of the chromosomes.
Why do cells need to double their chromosomes before mitosis starts?
They are in need of reproduction.
Do homologous chromosomes pair in mitosis?
Homologous chromosomes do not pair in mitosis. Mitosis is the process of cell division where a cell duplicates its DNA and splits into two identical daughter cells, so the homologous chromosomes do not need to pair up like they do in meiosis.
How many chromosomes are there in each daughter cell after mitosis?
There are 46 chromosomes or 23 pairs of chromosomes in each daughter cell after mitosis. Each daughter cells need 46 or 23 pairs of chromosomes to work properly and survive.
Why do chromosomes line up in the middle of the cell during metaphase?
During metaphase, chromosomes line up in the middle of the cell to ensure that they are evenly distributed to the two daughter cells during cell division. This alignment helps to ensure each daughter cell receives a complete set of chromosomes. It also allows for proper segregation of genetic material.
What cellular process would be directly affected by a catalyst that blocked a certain step in the separation of chromosomes?
The cellular process affected would be cell division, specifically during the phase of mitosis where the chromosomes need to separate into two daughter cells. Hindering this process could lead to cells with an abnormal number of chromosomes, causing genetic instability and potentially leading to cell death or mutation.
In what stage does the nuclear membrane disintegrate?
Mitosis Prophase. Yep one homework question answered!
What is happening when chromosomes attach to spindle fibers?
That would be during metaphase in mitosis and the chromosomes attach to the spindle fibers because each half of the chromosomes need to migrate to the opposite poles. The spindle fibers are temporary but aid in the movement of the chromosomes.
Why does the nuclear membrane need to disappear during prophase?
The nuclear membrane needs to disappear during prophase to facilitate the proper alignment and separation of chromosomes during cell division. By disintegrating, it allows spindle fibers to access the chromosomes, ensuring they can attach to the kinetochores and be effectively pulled apart during later stages of mitosis. This disappearance is crucial for the accurate distribution of genetic material to the daughter cells.
Why is it important that sex cells do not go through mitosis?
sex cells need to go through meiosis because the daughter cells will get half the chromosomes. if they when through mitosis they would get all the necessary chromosomes and when an egg is fertilized and creates a child it will have double the number of chromosomes that it needs. it could cause mutations.
What phase is the early and a late stage of the the same phase of mitosis?
The early and late stages of the same phase of mitosis are called prophase. Prophase is the first stage of mitosis where the chromatin condenses into chromosomes and the nuclear membrane breaks down. The late stage of prophase is characterized by the alignment of chromosomes along the equator of the cell.
