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3 years ago

What structure is involved in moving chromosomes during mitosis

Biology

1 answer:

Ivahew [28]3 years ago

6 0

Explanation:

<u>-Mitotic spindle fibers</u>

Spindle fibers are microtubule derived structures, formed from a region of the centrosome, called the microtubule organizing center. These proteins attach to the cell's genetic material during nuclear division, to separate genetic material.

Further Explanation:

All the genetic information within the eukaryotic cell is stored within the nucleus as helical DNA. This DNA is tightly wound around histones as chromosomes. In meiosis, the number of chromosomes (2n) is halved through meiotic divisions, producing 4 (n) germ cells (sperm or eggs), each containing half the number of chromosomes as its parent cell.

At A, crossing over: the exchange of segments of chromosome, between non-sister homologous or similar chromatids crossing over happens at chiasmata, the point where non-sister chromosomes are joined. in prophase I

Spindle fibers join sister chromatids together at their centromeres in metaphase I, pulling them to the equator of the cell;

then, in anaphase I, while joined, they are pulled to opposite sides of the cell; the cell body splits and the nuclear envelope reforms in telophase I

Later, in prophase II, the cellular envelope disintegrates and mitotic spindle fibers are formed

independent assortment occurs. in metaphase II of meiosis: spindle fibers attach to centromeres, chromatids align independently at the equator. Genes segregate independently into new combinations as sister chromatids are pulled apart by their centromeres in anaphase II

in telophase II the cells' nuclei and membrane are then formed with each containing the haploid number (n)

Following the formation of gametes in the last stage, randomized fertilization occurs in sexual reproduction sperm cells fertilize an ovum to form a zygote. This occurs randomly by chance, to result in a complete set of chromosomes 2n, that is a novel combination of half each parent's number of chromosomes

Learn more about mitosis at brainly.com/question/4303192

Learn more about transcription at brainly.com/question/11339456

Learn more about DNA and RNA at brainly.com/question/2416343?source=aid8411316

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The gene theory declares that all organisms contain coded information in __________ which dictates the form and function of orga

lilavasa [31]

The gene theory declares that all organisms contain coded information in DNA which dictates the form and function of organisms.

<h3>What does the gene theory state?</h3>

Gene theory is one of the major principles of biology that explains the inheritance of traits coded by gene from parents to offspring.

This theory further explains that genes are located on chromosomes and consist of DNA, which stores them.

Therefore, the gene theory declares that all organisms contain coded information in DNA which dictates the form and function of organisms.

Learn more about gene theory at: brainly.com/question/4432306

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2 years ago

The bird in the photo is resting on the bison to cross the river. It's also utilizing the bison as a safety place for any alliga

miv72 [106K]

Answer:

commensalism

Explanation:

Commensalism is a symbiotic relationship in which one species benefits from the interaction and the other species is neither harmed nor helped. So the bird is being helped and the bison is being neither harmed nor helped.

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3 years ago

How do you use this alp

lidiya [134]

When u need a question answered you click on the camera or you could even type it but I like the camera and u just take a picture of the problem and then u go to the most recent ones that have the correct question on it and scroll down and see the answers but for me I check if there are more than 2 answers of the same one before answering it.

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3 years ago

Describe the effect of amanitin on the maximum elongation rate for the wild-type and modified RNA polymerases

Scrat [10]

Answer:

The effect of amanitin on the maximum elongation rate for the wild-type and modified RNA polymerases is that it binds to the RNA polymerases, and reduces the process of translocation which is essential for RNA synthesis that is required for RNA polymerases elongation.

Explanation:

Amanitin is a peptide that is cyclic in nature. It is repelled by water thereby making it an hydrophobic peptide.

Amanitin is a toxic peptide that is found in Amanita ( a type of mushroom).

Alpha Amanitin in particular is the one that affects the elongation rate of RNA Polymerases in the body.

When Alpha Amanitin gets into the body system, it travels straight to the liver and due to its very strong affinity for RNA polymerases, it immediately attaches itself to them.

After the attachment, Alpha Amanitin, is disturbs the bridge helix found in RNA polymerase, preventing the hindering and slowing down the proces of translocation from happening.

Once translocation is hindered, RNA is no longer synthesized. Hence, the elongation of RNA polymerases is hindered and this results in severe illness in the body such as liver failure, cytolysis of the liver

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3 years ago

Which is the definition of an embryo?

raketka [301]

<span>the young of a viviparous animal, especially of a mammal, in the early stages of development within the womb, in humans up to the end of the second month.

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3 years ago