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  Encyclopedia of Keywords > Cell Cycle > Mitosis > Meiosis   Michael Charnine

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  1. Meiosis is a process to convert a diploid cell to a haploid gamete, and cause a change in the genetic information to increase diversity in the offspring. (Web site)
  2. Meiosis is the process in which a cell divides into four cells and the number of chromosomes in the daughter cells is half the number in the parent cell. (Web site)
  3. Meiosis is the process whereby cells divide into two "haploid" cells, each with half the number of chromosomes. (Web site)
  4. Meiosis, a type of cell division, results in production of gametes (eggs & sperm). (Web site)
  5. Meiosis is the name of the process in which a woman produces eggs or a man produces sperm. (Web site)

Spore Production

  1. The moss capsule (sporangium) is the site of meiosis and spore production. (Web site)

Nuclear Division

  1. Cytokinesis usually occurs after a cell has undergone nuclear division as part of mitosis or meiosis. (Web site)


  1. It comprises a capsule which produces spores by meiosis and a stalk which holds this aloft the gametophyte.
  2. In diplohaplontic organisms a haploid phase (gametophyte) exists in the life cycle between meiosis and fertilization (e.g. (Web site)


  1. Metaphase: A stage in mitosis or meiosis during which the chromosomes are aligned along the equatorial plane of the cell.
  2. MEIOSIS II METAPHASE. The haploid set of 23 chromosomes, each consisting of a pair of sister chromatids, moves to the equatorial plate of the spindle. (Web site)


  1. Meiosis occurs immediately after the formation of zygot, resulting in the formation of four haploid nuclei, which are incorporated in Basidiospores.


  1. The subphylum Basidiomycota is characterized by the production of a basidium, a cell in which meiosis occurs and from which sexual spores are produced.
  2. Centrioles assist the cell through the process of mitosis and in male meiosis. (Web site)
  3. The distinguishing morphological character of this group of fungi is a cell in which meiosis occurs (a meiocyte) called an ascus (plural asci).


  1. Mold spores can be asexual (the products of mitosis) or sexual (the products of meiosis); many species can produce both types. (Web site)
  2. Teleomorph: the sexual (perfect) state of a fungus (ascomycete or basidiomycete) whose spores are produced by meiosis. (Web site)

Life Cycle

  1. The eggs and sperms are products of meiosis and the only parts of the life cycle that are haploid. (Web site)
  2. Life cycle of animals include a dominant diploid adult that produces eggs or sperms by meiosis. (Web site)
  3. The following description of the characteristics of Basidiomycota traces the life cycle of a "typical" species, beginning at the site of meiosis.


  1. In sexual reproduction, there is shuffling of chromosomes during meiosis and therefore the offspring is not genetically identical to the parent.
  2. This cell immediately undergoes meiosis, a type of nuclear cell division that produces offspring with half the genetic material as the parents. (Web site)
  3. Most importantly, however, meiosis produces genetic variety in gametes that propagate to offspring. (Web site)


  1. Reproduction without meiosis or formation of gametes. (Web site)
  2. This method of reproduction is found for example in conidial fungi and the red alga Polysiphonia, and involves sporogenesis without meiosis.
  3. Intratetrad mating by the rapid fusion of the early products of meiosis seems to be the predominant mode of reproduction in M. violaceum (Fig.


  1. In both situations, genes in females are choosing which set of male-derived genes to recombine with at meiosis in the next diploid generation. (Web site)

Reproductive Cells

  1. Reproductive cells, formed as a result of meiosis, are haploid. (Web site)

Four Cells

  1. Meiosis, on the other hand, results in four cells, none of which is identical to the original. (Web site)

Sperm Cells

  1. Meiosis is the type of cell division that creates egg and sperm cells. (Web site)


  1. The euploid primary spermatocytes undergo meiosis and give rise to the haploid secondary spermatocytes which in turn give rise to spermatids. (Web site)
  2. Spermatocytes inside the tubules divide by meiosis to produce spermatids that in turn develop into mature sperm. (Web site)

Cell Division

  1. Reproduction by cell division (binary fission, mitosis or meiosis). (Web site)
  2. Meiosis and cell division is the process by which one diploid eukaryotic cell divides to generate four haploid cells often called gametes. (Web site)
  3. D. Cell division and cell cycle: Mitosis and meiosis, their regulation, steps in cell cycle, and control of cell cycle. (Web site)


  1. Early during the process of fertilization and meiosis, the protoperithecium enlarges and becomes the perithecium. (Web site)


  1. The asci occur in large numbers, forming a continuous layer, the hymenium, in the ascocarp; the ascospores are produced by meiosis. (Web site)


  1. The gametangia fuse, forming a zygote, which immediate goes through meiosis to form four zygospores. (Web site)


  1. Meiosis of this zygote then gives rise to the haploid ascospores.
  2. Meiosis then gives rise to four haploid nuclei, usually followed by a further mitotic division that results in eight nuclei in each ascus.
  3. These give rise to specialized diploid cells in the ovary and testis that can divide by meiosis to produce haploid gametes (sperm and egg).

Giving Rise

  1. As the spores germinate, the nuclei undergo karyogamy and thereafter meiosis, giving rise to four-celled basidia with haploid basidiospores.
  2. Each zygote divides immediately by meiosis to form four haploid spores, which when release are dispersed, some of them giving rise to new hyphae.
  3. Then meiosis occurs, giving rise to four haploid nuclei. (Web site)


  1. Meiosis takes place in each cell of the teliospore, in spring,and germinates to form the promycelium (=basidium). (Web site)


  1. Meiosis also occurs in teliospores of some smut fungi, but meiotic division is more characteristic of the tubular basidium that develops at germination. (Web site)
  2. In the spring the teliospores undergo meiosis and germinate to form basidia. (Web site)


  1. Meiosis I of ootidogenesis starts at embryonic age, but halts in diplotene of prophase I until puberty.
  2. The further development comes to a rest during prophase I of meiosis until puberty.
  3. In females, all primary oocytes enter meiosis I during fetal development but then arrest at the prophase I stage until puberty. (Web site)


  1. In males, meiosis occurs in precursor cells known as spermatogonia that divide twice to become sperm.


  1. Meiosis results in the formation of either gametes (in animals) or spores (in plants).
  2. Plants on the other hand have mitosis occurring in spores, which are produced by meiosis. (Web site)
  3. In plants, meiosis produces spores which results in the formation of haploid cells that can divide vegetatively without undergoing fertilization. (Web site)

Four Products

  1. Meiosis occurs within the basidium, and the four products are extruded from the tip of the basidium on sterigma (below). (Web site)


  1. ORDERED TETRAD - the linear arrangement in the ascus of spores resulting from meiosis.
  2. The spores may remain attached to each other in a tetrad or separate after meiosis. (Web site)
  3. There are four kinetochores on each tetrad, but the pair of kinetochores on each sister chromatid fuses and functions as a unit during meiosis I.


  1. The process of meiosis in females is called oogenesis. (Web site)

Somatic Cells

  1. The general principle is that mitosis creates somatic cells and meiosis creates germ cells. (Web site)
  2. These stem cells stop at the diplotene stage of meiosis I and lay dormant within a protective shell of somatic cells called the follicle. (Web site)
  3. Division of somatic cells is termed mitosis; egg and sperm precursors are formed following meiosis. (Web site)


  1. It is at this point ovulation takes place, meiosis again halted (until fertilisation).

Egg Cells

  1. Sperm and egg cells are created through a process called meiosis, where a cell's chromosomes are duplicated before the cell divides twice. (Web site)
  2. Meiosis may result in millions of spermazoa and egg cells with unique genetic patterns. (Web site)
  3. Meiosis occurs in humans, giving rise to the haploid gametes, the sperm and egg cells. (Web site)
  4. In meiosis, a cell divides twice to produce sperm and egg cells with a single copy of each chromosome. (Web site)

Parent Cell

  1. Crossing over assures that the cells produced as a result of meiosis will be different from and exhibit variations from the parent cell that produced them. (Web site)
  2. Meiosis differs significantly from mitosis in that the cellular progeny have their complement of genetic material reduced to half that of the parent cell. (Web site)

Full Complement

  1. Instead of carrying half of the species' chromosomes, they carried the full complement of genetic material -- implying that they had not undergone meiosis.


  1. DAZ family proteins exist throughout male germ cell development and transit from nucleus to cytoplasm at meiosis in humans and mice. (Web site)
  2. In females, meiosis II produces a small second polar body containing one set of chromosomes and a small amount of cytoplasm. (Web site)


  1. Interphase in meiosis is identical to interphase in mitosis.
  2. In interphase, the cell gets itself ready for mitosis or meiosis. (Web site)
  3. Meiosis I is preceded by interphase, in which the chromosomes are replicated to form sister chromatids.

Fungal Phyla

  1. Sexual reproduction Sexual reproduction with meiosis exists in all fungal phyla (with the exception of the Glomeromycota). (Web site)


  1. The existence of a multicellular, haploid phase in the life cycle between meiosis and gametogenesis is also referred to as alternation of generations. (Web site)


  1. Meiosis occurs in the oogonia and antheridia; the postmeiotic haploid nuclei being packaged into gametes.
  2. Each oogonia that initiates meiosis will divide twice to form a single oocyte and two polar bodies.


  1. The diploid sporophytes then produce haploid spores by meiosis, and these are dispersed and grow into new gametophytes. (Web site)
  2. The gametophytes grow from haploid spores after sporic meiosis. (Web site)
  3. In all seed plants, spores are produced by meiosis and develop into gametophytes while still inside the sporangium. (Web site)

Daughter Cells

  1. Meiosis II separates the chromatids producing two daughter cells each with 23 chromosomes (haploid), and each chromosome has only one chromatid. (Web site)
  2. Meiosis results in four rather than two daughter cells, each with a haploid set of chromosomes. (Web site)
  3. The second process, called meiosis is the production of daughter cells having half the amount of genetic material as the original parent cell.
  4. Because meiosis only occurs in the sex organs (gonads), the daughter cells are the gametes (spermatozoa or ova), which contain hereditary material. (Web site)


  1. Centromere: Portion of the chromosome holding the two chromatids together before anaphase stage of mitosis or anaphase II stage of meiosis. (Web site)
  2. Meiosis II consists of decoupling each chromosome's sister strands (chromatids), and segregating the individual chromatids into haploid daughter cells. (Web site)
  3. Before meiosis, chromosomes replicate and consist of joined sister strands (chromatids). (Web site)

Sac-Like Structure

  1. This is a sac-like structure in which ascospores are formed following karyogamy and meiosis. (Web site)
  2. It also reproduces sexually by forming a sac-like structure, called an ascus, which contains four ascospores produced via meiosis. (Web site)


  1. Ascospore: A haploid sexual spore that is formed by free-cell formation in an ascus following karyogamy and meiosis.
  2. Asci are the site of meiosis and meiospore (ascospore) production (Fig. (Web site)

Haploid Mycelium

  1. Incorrect. Haploid spores are produced by meiosis, which then germinate to produce a haploid mycelium. b. (Web site)
  2. The diploid zygospore reduces by meiosis to form haploid spores that will produce a haploid mycelium through mitosis. c. (Web site)

Genetic Recombination

  1. They can be hybrids produced through crossover (a form of genetic recombination) of chromosomes, which takes place in meiosis. (Web site)
  2. GENETIC RECOMBINATION - the reassortment of genes produced as a result of crossing-over during meiosis.
  3. The cyclical process of separation by meiosis and genetic recombination through fertilization is called the life cycle. (Web site)


  1. Cell Cycle > Mitosis
  2. Chromosomes
  3. Spores
  4. Nature > Life > Reproduction > Sexual Reproduction
  5. Fertilization

Related Keywords

    * Asci * Ascospores * Ascus * Basidia * Basidiospore * Basidium * Cells * Chromosomes * Chromosome Number * Cycle * Diploid * Diploid Cell * Diploid Cells * Diploid Nucleus * Diploid Zygote * Division * Eukaryotes * Fertilization * Form * Formation * Fungi * Fusion * Gamete * Gametes * Genes * Germination * Haploid * Haploid Ascospores * Haploid Cells * Haploid Gamete * Haploid Gametes * Haploid Hyphae * Haploid Nuclei * Haploid Spore * Haploid Spores * Homologous Chromosomes * Hyphae * Karyogamy * Males * Meiospores * Microspores * Mitosis * Mitotic Division * Mitotic Divisions * Nuclei * Oocyte * Oocytes * Oogonium * Ootid * Ootids * Perpendicular * Phases * Plasmogamy * Process * Prophase * Recombination * Result * Secondary Oocyte * Secondary Oocytes * Sexual Reproduction * Sex Cells * Sperm * Sporangia * Sporangium * Spore * Spores * Sporophyte * Syngamy * Zygospore * Zygospores * Zygote
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  Originally created: August 01, 2010.
  Links checked: February 25, 2013.
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