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Sexual Reproduction In Flowering Plants

Question
CBSEENBI12001279

Describe apomixis , parthenocarpy and polyembryony

Solution
Special modes of reproduction

1. Apomixis (Agamospermy). It is a modified form of reproduction in which seeds are formed without fusion of gametes. It includes the process whereby a diploid cell of nucellus develops into an embryo, giving a diploid seed with a genetic constitution identical to the parent. It is helpful in theproduction of hybrid seeds

2. Parthenocarpyis the condition where the fruits are formed without  fertilization. Seedless varieties of gfruits can be obtained.

3. Polyembryony. Formation of more than one embryo in the seed. Lemon, oranges are some of examples. Polyembryony is very common among conifers.