How many cells are produced by mitosis?
After mitosis two identical cells are created with the same original number of chromosomes, 46. Haploid cells that are generated through meiosis, such as egg and sperm, only have 23 chromosomes, because, remember, meiosis is a "reduction division."
The cell copies its chromosomes, but then separates the 23 pairs to ensure that each daughter cell has only one copy of each chromosome. A second division that divides each daughter cell again to produce four daughter cells. See below for more detailed descriptions of mitosis and meiosis.
- In male animals, meiosis takes place in the testes and in females within the ovaries. In plants, meiosis occurs in the anthers to form pollen grains and within the ovary to form ovules. In meiosis a diploid cell divides in such a way so as to produce four haploid cells. These haploid cells are known as gametes.
- During meiosis one cell? divides twice to form four daughter cells. These four daughter cells only have half the number of chromosomes? of the parent cell – they are haploid. Meiosis produces our sex cells or gametes? (eggs in females and sperm in males).
- Mitosis is a process where a single cell divides into two identical daughter cells (cell division). During mitosis one cell? divides once to form two identical cells. The major purpose of mitosis is for growth and to replace worn out cells.
Mitosis gets two daughter cells, each diploid (2n) and genetically identical to the parent cell. Meiosis gives four daughter cells, each haploid (n), containing half as many chromosomes as the parent cell and genetically different from the parent cell and from each other.
- In meiosis homologous chromosomes separate leading to daughter cells that are not genetically identical. In mitosis the daughter cells are identical to the parent as well as to each other. Prior to meiosis or mitosis, DNA replication occurs. two cells with no net change in the number of chromosomes.
- Mitosis gets two daughter cells, each diploid (2n) and genetically identical to the parent cell. Meiosis gives four daughter cells, each haploid (n), containing half as many chromosomes as the parent cell and genetically different from the parent cell and from each other.
- (See figure below, where meiosis I begins with a diploid (2n = 4) cell and ends with two haploid (n = 2) cells.) In humans (2n = 46), who have 23 pairs of chromosomes, the number of chromosomes is reduced by half at the end of meiosis I (n = 23).
A human cell has 46 total or 23 pairs of chromosomes. Following mitosis, the daughter cells would each have a total of ______ chromosomes. After meiosis I, the two daughter cells would have _____chromosomes, and after meiosis II ______ chromosomes.
- There are two types of cell division. Mitosis is used for growth and repair and produces diploid cells identical to each other and the parent cell. Meiosis is used for sexual reproduction and produces haploid cells different to each other and the parent cell.
- For humans, this means that during prophase and metaphase of mitosis, a human will have 46 chromosomes, but 92 chromatids (again, remember that there are 92 chromatids because the original 46 chromosomes were duplicated during S phase of interphase).
- What is the difference between cytokinesis in plants and animals? Organelles: Centrioles and spindle fibers do not appear in plant cells as they do in animal cells. Animal cells form a cleavage furrow while plant cells eventually build a cell wall between the two daughter cells.
Updated: 26th November 2019