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see reproductionreproduction,
capacity of all living systems to give rise to new systems similar to themselves. The term reproduction may refer to this power of self-duplication of a single cell or a multicellular animal or plant organism.
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a cell formed as a result of the fusion of gametes. The term “zygote” was introduced by the German botanist E. Strassburger. As distinct from gametes, a zygote has a diploid (double) set of chromosomes. The zygote develops directly after fertilization or, as in many algae and fungi, takes on a thick covering and becomes a dormant spore, often called a zygospore, for some time.


An organism produced by the union of two gametes.
The fertilized ovum before cleavage.
References in periodicals archive ?
The researchers transferred this nuclei into another fertilized egg cell which had had its own nuclei removed.
Each fertilized egg cell even establishes two distinct halves, along what is called the anterior-posterior axis.
The mutants are zebra fish, or Danio rerio, and they are the rage among developmental biologists, who study the seemingly miraculous process in which a fertilized egg cell becomes a multicellular adult organism.