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parthenogenesis    
n. 單性生殖,孤雌生殖

單性生殖,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 . . .
    Parthenogenesis, which derives from Greek and translates to “virgin birth”, is a type of asexual reproduction in which the offspring of some species develops from the egg or female gamete without first being fertilised by the male gamete
  • 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
  • How Parthenogenesis Works: Reproduction Without Fertilization
    Parthenogenesis is a form of reproduction that allows an embryo to develop from an unfertilized egg cell This asexual process bypasses the need for a male gamete entirely, resulting in a fully formed, viable offspring
  • Reproductive biology: A genetic recipe for parthenogenesis
    A particularly intriguing method of reproduction is parthenogenesis Here, progeny develop from a female’s oocytes with no involvement of a male Parthenogenesis occurs in numerous insect species (e g 7, 8) as well as in reptiles, birds, and fishes (e g 9, 10)
  • 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
  • Parthenogenesis: When Female Sharks Reproduce Without a Mate
    Fish, snakes, lizards, and even birds have all been observed to be able to reproduce without fertilization—a phenomenon known as parthenogenesis Asexual reproduction, or the ability of a parent to clone itself to produce offspring, is common for many plants and invertebrates—for example, sea stars
  • 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)
  • 10 Animals That Exhibit Parthenogenesis - WorldAtlas
    Parthenogenesis is a natural reproduction process in lower plants and various animals Parthenogenesis involves the development of embryos from unfertilized eggs





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