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omeli [17]
1 year ago
14

Which type of reproduction involves two parents and results in offspring

Biology
1 answer:
topjm [15]1 year ago
4 0
Sexual reproduction
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What structure is involved in moving chromosomes during mitosis
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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

#LearnWithBrainly

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3 years ago
compare and contrast the climate and biotic factors of tropical seasonal forests and temperature forests.
Olegator [25]

Answer:

Explanation:

Tropical seasonal forests:Less rain than tropical rain forest.Colder tan TRF. Less shrubs and close to the ground vegetation. Compare:Both have somewhat of the same animals.And both can be found on the same continent. Both very wet year round

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