self-fertilization
self-fer·til·i·za·tion
(sĕlf′fûr′tl-ĭ-zā′shən)self-fertilization
orself-fertilisation
self′-fertiliza′tion
n.
| Noun | 1. | self-fertilization - fertilization by the union of male and female gametes from the same individual |
| 单词 | self-fertilization | |||
| 释义 | self-fertilizationself-fer·til·i·za·tion(sĕlf′fûr′tl-ĭ-zā′shən)self-fertilizationorself-fertilisationself′-fertiliza′tionn.
Self-FertilizationSelf-Fertilizationthe merging of male and female sex cells belonging to a single bisexual individual (see HERMAPHRODITISM). Self-fertilization is rarely observed in nature. In the process of evolution, most organisms acquired adaptations that made self-fertilization impossible and ensured cross-fertilization. These adaptations increased the genetic variation of the off spring, promoting, in turn, the elaboration of new adaptations and the development of more viable offspring. Self-fertilization is sometimes observed in hydras, flatworms, certain annelids, mollusks, and fishes. Among plants it is observed in many algae, fungi, and flowering plants. In flowering plants self-fertilization is a result of self-pollination. self-fertilizationself-fer·til·i·za·tion(self'fer'til-i-zā'shŭn),self-fertilization(sĕlf′fûr′tl-ĭ-zā′shən)self-fertilizationthe fusion of male and female GAMETES from the same HERMAPHRODITE individual. Self-fertilization is fairly rare in animals (occurring, for example, in some snails and nematode worms) but is common in some plant groups. see SELF-POLLINATION. Compare CROSS-FERTILIZATION.self-fertilization
Synonyms for self-fertilization
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