Question:
Which one of the following events lead to double fertilization?
Which one of the following events lead to double fertilization?
Updated On: Jun 21, 2022
- Fusion of two polar nuclei
- Fusion of a male gamete with the egg and the other with antipodal cells
- Fusion of male gamete with the egg and the other with. secondary nucleus
- Fusion of a male gamete with two polar nuclei and the other with nucellar cells
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The Correct Option is C
Solution and Explanation
In angiosperms, double fertilization which is a unique angiosperm feature (first discovered by Nawaschin in 1898 in Fritillaria and Lilium) occurs when one male gamete fuses with the egg cell to produce diploid zygote while the other male gamete fuses with diploid secondary nucleus (formed by fusion of two polar nuclei) to produce primary endosperm nuclei which produces endosperm. As endosperm results by fusion of a diploid nucleus and a haploid gamete hence it is a triploid structure.
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Concepts Used:
Sexual Reproduction in Flowering Plants
Sexual reproduction in flowering plants takes place or happens when the production of a new organism occurs from two parents by making use of their gametes or sex cells. Both sexual and asexual reproduction can be found in plants. Nearly all flowering plants reproduce sexually. Flowers play a captious role in the process as it carries both the male and female reproductive parts commonly known as androecium and gynoecium respectively.
An individual flower comprises the following parts -
- Pedicle
- Calyx
- Petals
- Sepals
- Stamen
- Pistil
- Receptacle