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Adventitious embryony

Definition
noun
A form of apomixis where a nucellar embryo arises from the diploid nucellus tissue surrounding the embryo sac.
Supplement
Apomixis in flowering plants exists in two forms:

Adventitious or nucellar embryony occurs in some citrus seeds. Male apomixis also occurs in rare cases, such as the Saharan Cypress where the genetic material of the embryo are derived from pollen. It was also observed to occur in some animals such as water fleas.
See also: asexual reproduction, meiosis


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