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parthenogenesis    
n. 单性生殖,孤雌生殖

单性生殖,孤雌生殖

parthenogenesis
n 1: human conception without fertilization by a man [synonym:
{parthenogenesis}, {parthenogeny}, {virgin birth}]
2: process in which an unfertilized egg develops into a new
individual; common among insects and some other arthropods
[synonym: {parthenogenesis}, {parthenogeny}]

parthenogenesis \par`the*no*gen"e*sis\
(p[aum]r`th[-e]*n[-o]*j[e^]n"[-e]*s[i^]s), n. [Gr. parqe`nos
a virgin E. genesis.]
1. (Biol.) The production of new individuals from virgin
females by means of ova which have the power of developing
without the intervention of the male element; the
production, without fertilization, of cells capable of
germination. It is one of the phenomena of alternate
generation. Cf. {Heterogamy}, and {Metagenesis}.
[1913 Webster]

2. (Bot.) The production of seed without fertilization,
believed to occur through the nonsexual formation of an
embryo extraneous to the embryonic vesicle.
[1913 Webster]


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  • Parthenogenesis - Wikipedia
    In animals, parthenogenesis means the development of an embryo from an unfertilized egg cell In plants, parthenogenesis is a component process of apomixis In algae, parthenogenesis can mean the development of an embryo from either an individual sperm or an individual egg
  • Parthenogenesis | Definition, Types, Facts | Britannica
    Parthenogenesis, a reproductive strategy that involves development of a female (rarely a male) gamete (sex cell) without fertilization It occurs commonly among lower plants and invertebrate animals (particularly rotifers, aphids, ants, wasps, and bees) and rarely among higher vertebrates
  • Explainer: What Is Parthenogenesis And Can It Help Protect Endangered . . .
    Artificial insemination is emerging as a means to aid the survival of some endangered animals What is parthenogenesis and can we use it to save them?
  • Parthenogenesis - Examples, Types, and Significance - GeeksforGeeks
    Parthenogenesis is a reproductive process in which a female can produce an embryo without prior fertilization of an egg with sperm Some of the parthenogenesis examples include invertebrates such as ants, wasps, aphids, bees, etc Parthenogenesis in plants is less common than in animals It can be natural in some species, for example, in some algae, nematodes, etc , or it can be induced in
  • What Is Parthenogenesis and How Does It Work? - Biology Insights
    Parthenogenesis is a natural form of asexual reproduction where an embryo develops from an unfertilized egg The term originates from Greek, combining “parthenos” (virgin) and “genesis” (creation) This reproductive strategy is observed across various forms of life, from lower plants and invertebrates to some vertebrates The Mechanics of Parthenogenesis The biological processes
  • What Is Parthenogenesis in Biology? - ScienceInsights
    Parthenogenesis is a widespread phenomenon observed across numerous animal phyla, though it is concentrated heavily in invertebrates Insects, for example, demonstrate haplodiploidy, where unfertilized eggs develop into males, while fertilized eggs become females; this system is observed in many bees, wasps, and ants
  • Parthenogenesis - an overview | ScienceDirect Topics
    Parthenogenesis Parthenogenesis is the development of a new offspring from an unfertilized egg Parthenogenetic lineages occur in many insect species, but are widespread among other invertebrate taxa (Table 1) It entails modification or absence of meiosis so that the eggs remain diploid and do not have to fuse with sperm to give rise to a diploid zygote This kind of parthenogenesis is termed
  • Parthenogenesis | Zoology | Research Starters - EBSCO
    Parthenogenesis is a form of unisexual reproduction where offspring develop from unfertilized eggs, resulting in genetically identical individuals This reproductive strategy is particularly advantageous in species that thrive in disturbed habitats, as it allows for rapid population increase when environmental conditions are favorable The term itself originates from Greek, meaning "virgin
  • Parthenogenesis - Definition, Types - Biology Notes Online
    Parthenogenesis is a reproductive method involving the formation of a female (rarely a male) gamete (sex cell) in the absence of fertilisation It is common in lower plants and invertebrate animals (especially rotifers, aphids, ants, wasps, and bees), but uncommon in higher vertebrates
  • Parthenogenesis, explained: How some animals have ‘virgin births . . .
    The process, called parthenogenesis, allows creatures from honey bees to rattlesnakes to have so-called “virgin births ” Such events can shock those who care for the animals





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