Asexual Reproduction

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by annerosspender
Last updated 5 years ago

Cell Biology

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Asexual Reproduction

Asexual Reproduction

Asexual reproduction ensures that identical copies of DNA are found in each new cell. The cell's chromosome, comprised of coupled chromatids called sister chromatid, bisects and shifts to opposite ends before cytoplasmic division. Thus, when cytokinesis occurs, a complete replica has been created.

Identical Copies

Mass Production

Organisms that utilize asexual reproduction are able to mass produce their offspring. In fact, in humans, almost two trillion cells divide every day. This is due to the efficiency and speed of asexual reproduction, as it takes only about 24 hours for cells to complete mitosis. In comparison, sexual reproduction lasts about nine months.

Uniparental Production

Asexual reproduction is completed without requiring two parents. While it is necessary for fertilization to occur in the case of sexual reproduction, cells that undergo mitosis function indiviually. Each goes through certain phases- prophase, metaphase, anaphase, and telaphase- that allow the cell to create a clone without the use of a companion.

Gamete Absence

Asexual reproduction does not require the use of gametes. Gametes are, accordingly, the male and female reproductive cells. During sexual reproduction, the gametes fuse to form a zygote. The zygote ensures that the correct number of chromosomes is assembled, which means each gamete must contribute half the number of chromosomes. Thus, using gametes in mitosis would not create a functional system.

Benefits & Drawbacks

One advantage is that asexual reproduction is highly useful in emergencies, when a specific population is scarce or low. This is due to the speed- about a day to reproduce- and the amount of cells that do it. A disadvantage is that offspring are less adaptable. They do not have the diversity sexually produced offspring have.

Uni/Multiparent Differences

Sexual production, which utilizes two parents, is able to produce genetic variation. This lets organisms fight dieases, evolve, and live longer. One parent, however, makes things less complicated and creates a clone with identical DNA. Overall, both of these systems have their drawbacks and advantages.



Binary Fission


Your Budding is a form of asexual reproduction where a new organism is created at a specific location. As the new growth matures, it remains on the parent organism. Examples of budding can often be seen on vegetation. The picture to the left is budding at the cellular level.

Vegetative propagation involves the removal of stems or cuttings, that, in favorable conditions, regrow their orginial tissue structures to form an entirely new plant.

Although other types of fission exist, binary fission is the most common form of asexual reproduction in prokaryotes. The cell duplicates its DNA, then divides its cytoplasm to create two new daughter cells.

Fragmentation, although similar to propagation, involves the regeneration of animals instead of plants. The photograph illustrates a starfish reproducing through fragmentation. The parent organism breaks off a piece of its body, which then matures into a fully functional adult.

Anne Ross Pender/Pd. 5/1.5.16


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