Dictionary > Pseudogamy

Pseudogamy

Definition
noun
(1) A form of parthenogenesis wherein the sperm stimulates the egg cell to develop into an embryo without fertilizing it; gynogenesis
(2) A type of reproduction where the embryo develops from the fusion of vegetative cells rather than of gametes; centrogamy
Supplement
Pseudogamy is a form of asexual reproduction since there is no union of gametes involved. It may be in the form of parthenogenesis wherein the sperm stimulates the egg cell to form an embryo without the need to fertilize it. In this way there are no genes from the male that are inherited. This is also referred to as gynogenesis.1 In this form of reproduction, mating is still required so that the sperm would stimulate the egg cell although no genetic material will be contributed during the development of an offspring. This is seen in certain salamanders of the genus Ambystoma.
In a restrictive sense, pseudogamy may also pertain to a reproductive process where in plants the embryo develops from the fusion of vegetative cells rather than of gametes. This is exemplified by the so-called pseudogamous apomixis as seen in Rosaceae and Poaceae, e.g. the Himalayan blackberry Rubus armeniacus and gamagrass Tripsacum dactyloides. In this mode of reproduction, pollination is required but there is no male inheritance.
Synonym(s):

  • pseudomixis
  • gynogenesis

See also:

  • parthenogenesis
  • asexual reproduction
  • Reference(s):

    1 Engelstädter, J. (2008). Constraints on the evolution of asexual reproduction. BioEssays. Review Article. 30(11–12): 1138–1150.


    You will also like...

    New Zealand - Biodiversity fauna
    New Zealand’s Biodiversity

    Find out more about New Zealand's unique biodiversity by exploring a range of different ecosystems and the key role of s..

    Non-Mendelian Inheritance
    Non-Mendelian Inheritance

    In this tutorial, find out more about certain types of inheritance that does not follow the Mendelian inheritance patter..

    Gene Regulation in Eukaryotes
    Gene Regulation in Eukaryotes

    Learn about the general structure of a eukaryotic gene, the transcription factors, and post-transcriptional regulation....

    Cell Biology
    Cell Biology

    The cell is defined as the fundamental, functional unit of life. Some organisms are comprised of only one cell whereas o..

    "Cronopio dentiacutus", a prehistoric mammal (an illustration)
    Mammalian Ancestors

    Mammals are a diverse group of organisms, where most of them develop their offspring within the uterus of the mother. Ov..

    Chemical composition of the body
    Chemical Composition of the Body

    The body is comprised of different elements with hydrogen, oxygen, carbon, and nitrogen as the major four. This tutorial..