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Sexual Reproduction In Flowering Plants

Question

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What is triple fusion ? Where and how does it take place ? Name the nuclei involved in triple fusion.

Solution

Triple fusion. It is the fusion of two polar nuclei of embryo sac with one male gamete. It is named triple fusion because three nuclei i.e two polar nuclei and one male nuclei fuse together to form a 3n cell.

It occurs in embryo sac. Triple fusion occurs when during fertilization the other male nuclei moves towards the central two polar nuclei and fuse with them forming 3n primary endosperm nucleus.

Nuclei involved are two polar nuclei and one nucleus of male gamete.

Some More Questions From Sexual Reproduction in flowering Plants Chapter

The female gametophyte of a typical dicot at the time of fertilization is:

Development of embryo from any cell of nucellus is called :

Parthenocarpic fruit is :

The entry of pollen tube into embryo sac through the integuments is termed as :

512 microspores will be formed following meiosis of how many microspore mother cells.

Pollination by water occurs in :

In ................... flowers, the thalamus grows upwards completely enclosing the ovary, and the stamens, petals and sepals are borne above the ovary.

In Calotropis, all the microspores of anther lobe remain united to form

Albuminous seeds store reserve food materials in ....................

Transfer of pollen grains from the anther to the stigma of another flower of same plant is called..............................

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