Q:

What is the purpose of meiosis?

A:

Meiosis is the process of cell division that creates offspring in sexually reproducing organisms, explains a University of Illinois at Chicago website. Unlike during mitosis, meiotic cell division starts with double the number of chromosomes in diploid parent cells. Meiosis cuts this number in half forming two haploid daughter cells. When these daughter cells combine and undergo fertilization, a zygote is created and the cell begins to develop.

Meiosis takes diploid parent cells, halves their genetic material, and combines the resulting daughter cells together. The end result is a zygote that consists of genetic material from both parent cells. After the zygote is formed, the organism returns to mitosis, or typical cell reproduction.

The process of meiosis has two main stages: Meiosis I and Meiosis II. Each stage is further broken down into four substages: Prophase, Metaphase, Anaphase and Telophase. Meiosis I involves the creation of the daughter cells from the diploid parent cells. In Prophase I, the chromosomes become visible, move toward the poles of the cell, the membrane disappears and chromosomes begin to swap genetic material. In Metaphase I, the genetic material attaches to centromeres in the cell. These centromeres begin to pull apart in Anaphase I, and they fully divide during Telophase I. Meiosis II involves the combination of the daughter cells. Each substage follows the pattern set in Meiosis I, but results in four haploid daughter cells with a standard amount of chromosomes.

Meiosis can be both sexual and asexual. One advantage of meiotic reproduction is that it can causes variation in the cell that could create new, beneficial adaptations. In this way, meiotic reproduction aids in natural selection.

Sources:

  1. uic.edu

Is this answer helpful?

Similar Questions

  • Q:

    How do I describe meiosis?

    A:

    Meiosis is the process in which cells divide to produce sex cells. Meiosis takes a single cell and divides it into four different cells with half of the necessary chromosomes for human development. Meiosis creates both egg and sperm cells.

    Full Answer >
    Filed Under:
  • Q:

    When does meiosis occur in humans?

    A:

    Meiosis in humans happens before birth in females, and constantly after puberty in males. Meiosis is the production of gametes, the cells used in sexual reproduction, and females possess nearly their full complement of partially developed eggs at birth. Males, on the other hand, don't even begin producing sperm until puberty, after which they create tens of millions to billions per day.

    Full Answer >
    Filed Under:
  • Q:

    Why is meiosis important to living things?

    A:

    Meiosis is important to eukaryotes, such as plants, animals and fungi, because it is the method by which they produce sex cells. The ability to produce sex cells, and therefore reproduce sexually, increases the genetic diversity of the population. This increased genetic diversity provides a greater pallet of mutations on which natural selection can act.

    Full Answer >
    Filed Under:
  • Q:

    What is a simple explanation of meiosis for dummies?

    A:

    Meiosis is the cell division process that creates sex cells from ordinary chromosome cells. It is a vital part of the sexual reproduction process. The sex cells that are produced by meiosis are unique and also have their own genetic structure. The process of meiosis occurs in plants, animals and some fungi.

    Full Answer >
    Filed Under:

Explore