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4 years ago

What structure is involved in moving chromosomes during mitosis

Biology

1 answer:

Ivahew [28]4 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 promoter region is the portion of dna to which rna polymerase binds at the start of transcription.

Andrews [41]

The given statement holds True.

<h3>What is Transcription?</h3>

The act of transcribing a section of DNA into RNA is called transcription. Messenger RNA is the term for DNA segments that have been translated into RNA molecules that can encode proteins (mRNA). Non-coding RNAs are formed when additional DNA segments are transcribed into RNA molecules (ncRNAs).

In a given tissue, the amount of mRNA is more than 10 times more than the amount of ncRNA when averaged across different cell types (though in particular single cell types ncRNAs may exceed mRNAs). Less than 2% of the human genome can be transcribed into mRNA, but at least 80% of mammalian genomic DNA can be actively transcribed (in one or more types of cells), with the majority of this 80% thought to be mRNA, the general preponderance of mRNA in cells is valid despite this.

Learn more about transcription with the help of the given link:

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2 years ago

jonny [76]

Answer:

The fact that only cells are able to produce more cells is part of cell theory. The idea that organisms can develop independently of cells is called spontaneous generation, and it isn't supported by cell theory. Spontaneous generation suggests that living organisms develop from non-living matter.

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4 years ago

Why do you think scientists want to be able to forecast space weather?

DiKsa [7]

Answer:

Scientists would most likely want to forecast space weather in order to know if it is safe for not only to lift off into outer space, but to be able to help astronauts in any case of emergency if something were to happen in the future.

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3 years ago

Epistasis is where one gene hides the effects of another gene. In labrador dogs, the dominant allele (E) determines whether the

mestny [16]

Complete question:

I failed in finding the complete question. However, in the answer and explanation boxes, I will determine the genotypes of labrador for each color.

Answer:

For black-haired dogs: BBEE, BBEe, BbEE, BbEe
For brown (chocolate) color: bbEE, bbEe
For Yellow color: BBee, Bbee, bbee.

Explanation:

Due to technical problems, you will find the complete answer and explanation in the attached files.

Download pdf

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3 years ago

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viva [34]

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3 years ago