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Self pollination is possible only in:
bisexual flowers with both stamens and pistil maturing at the different time
unisexual flowers with pistil maturing first
unisexual flowers with stamen maturing first
bisexual flowers with both stamens and pistil maturing at the same time
bisexual flowers with both stamens and pistil maturing at the same time
Self-pollination occurs when pollen grains are transferred from the anther to the stigma of the same flower or another flower on the same plant. For successful self-pollination to take place within the same flower (autogamy), the flower must be bisexual (containing both male stamens and female pistils) and both reproductive organs must mature at the exact same time (homogamy).
Self-pollination occurs when pollen grains are transferred from the anther to the stigma of the same flower or another flower on the same plant. For successful self-pollination to take place within the same flower (autogamy), the flower must be bisexual (containing both male stamens and female pistils) and both reproductive organs must mature at the exact same time (homogamy).
Think of self-pollination like a high-five between two hands in the same room. Both hands must be present in the room (bisexual flower) and both hands must be raised at the exact same moment (synchronous maturation) to make contact.
SAME: Self-pollination needs Anther and Stigma Maturing Every-time together (Bisexual + Homogamy).
In self-pollination, autogamy requires two key conditions: bisexual flowers (hermaphroditism) and synchronous maturation of anthers and stigma (homogamy). If stamens and pistils mature at different times (dichogamy, such as protandry or protogyny), self-pollination is prevented and cross-pollination is favored.
Autogamy refers to the transfer of pollen grains from the anther to the stigma of the same flower.
Bisexual flowers contain both androecium (stamens) and gynoecium (pistil/carpel).
Homogamy is the condition where male and female reproductive organs mature simultaneously.
Dichogamy (maturing at different times) prevents self-pollination and forces cross-pollination.
Assures seed formation even in the absence of external pollinators like insects or wind.
Maintains parental traits and genetic purity across generations.
Leads to inbreeding depression over multiple generations.
Limits genetic variation, reducing adaptability to changing environmental conditions.
Common in plants like peas (Pisum sativum), wheat, rice, and groundnut.
Utilized in agricultural plant breeding to preserve stable pure lines.
Option A is incorrect because different maturation times (dichogamy) prevent self-pollination.
Option B and Option C are incorrect because unisexual flowers contain either stamens or pistils, making self-pollination within the same flower impossible.
D is correct тАФ Self-pollination within a single flower requires it to be bisexual and for both stamens and pistil to mature simultaneously (homogamy).
In genetics questions on Mendel's experiments, remember Mendel chose garden peas (Pisum sativum) because they naturally undergo self-pollination due to bisexual flowers and cleistogamy, ensuring pure lines.
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