Unisexuality of flowers prevents

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Question

(c) : Unisexuality or dicliny is a condition in which two types of unisexual flowers are present $i.e.$, staminate (male flower) and pistillate (femal

Vedclass · Accepted Answer

autogamy, but not geitonogamy

Vedclass · Answer

(c) : Unisexuality or dicliny is a condition in which two types of unisexual flowers are present $i.e.$, staminate (male flower) and pistillate (female flower). The plant may be monoecious or dioecious. This is a device for cross pollination (or xenogamy). Both xenogamy and geitonogamy ($i.e. $ transfer of pollen from anther of one flower to stigma of another flower of either the same or genetically similar plant) are included under allogamy/cross pollination. Autogamy or self pollination ($i.e.$ transfer of pollen from anther to stigma of the same flower) occurs in bisexual flower.

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$A$ : Continued self-pollination checks inbreeding depression.
$R$ : Pollen release and stigma receptivity are synchronised.