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==Inheritance== In reproducing, most plants inherit their plastids from only one parent. In general, [[angiosperms]] inherit plastids from the female [[gamete]], where many [[gymnosperms]] inherit plastids from the male [[pollen]]. Algae also inherit plastids from just one parent. Thus the plastid DNA of the other parent is completely lost. In normal intraspecific crossings{{mdash}}resulting in normal hybrids of one species{{mdash}}the inheriting of plastid DNA appears to be strictly uniparental; i.e., from the female. In interspecific hybridisations, however, the inheriting is apparently more erratic. Although plastids are inherited mainly from the female in interspecific hybridisations, there are many reports of hybrids of flowering plants producing plastids from the male. Approximately 20% of angiosperms, including [[alfalfa]] (''Medicago sativa''), normally show biparental inheriting of plastids.<ref>{{cite journal | vauthors = Zhang Q | title = Why does biparental plastid inheritance revive in angiosperms? | journal = Journal of Plant Research | volume = 123 | issue = 2 | pages = 201β6 | date = March 2010 | pmid = 20052516 | doi = 10.1007/s10265-009-0291-z | bibcode = 2010JPlR..123..201Z | s2cid = 5108244 }}</ref>
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