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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 Parthenogenesis occurs naturally in some plants and animals, and in a few other eukaryotes such as oomycetes It has been induced artificially in some mammals
  • 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
  • Parthenogenesis: What Exactly Is Virgin Birth? Is It Possible In Humans?
    Parthenogenesis, or virgin birth, is when a female forms an embryo from an unfertilized egg, no sperm needed Seen in sharks, snakes, birds, insects and plants, not humans
  • Parthenogenesis - Examples, Types, and Significance
    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
  • A new hypothesis may explain human parthenogenesis and ovarian teratoma . . .
    Parthenogenesis (PG) is an asexual reproduction in which a female can produce an embryo without fertilizing an egg with sperm In Greek, it means the virgin creation
  • Parthenogenesis – Definition, Types, Mechanism, Examples and Significance
    Parthenogenesis is a type of reproduction where the egg develops into a new individual without fertilization by a male gamete No fertilization takes place This is a form of uniparental reproduction and is generally included under asexual reproduction
  • Parthenogenesis - PMC
    As a library, NLM provides access to scientific literature Inclusion in an NLM database does not imply endorsement of, or agreement with, the contents by NLM or the National Institutes of Health Parthenogenesis These references are in PubMed This may not be the complete list of references from this article
  • PARTHENOGENESIS Definition Meaning - Merriam-Webster
    The meaning of PARTHENOGENESIS is reproduction by development of an unfertilized usually female gamete that occurs especially among lower plants and invertebrate animals
  • Parthenogenesis - an overview | ScienceDirect Topics
    Although not parthenogenesis (‘virgin birth’) in the literal sense, this form of reproduction – called gynogenesis or pseudogamy – is genetically equivalent to parthenogenesis Gynogenetic development of individuals can often be induced, especially in fishes, by heat or cold shocks
  • 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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