Question

Double fertilisation is

• A. Fusion of two male gametes with one egg
• B. Fusion of one male gamete with two polar nuclei
• C. Fusion of two male gametes with two different eggs
• D. Syngamy and triple fusion

Answer 1

The correct option is D Syngamy and triple fusion

Double fertilization involves two haploid male gametes; one fertilizes the haploid egg cell to form the diploid zygote which eventually develops into the embryo. This process is called syngamy.
The other male gamete fuses with the two haploid polar nuclei in the central cell to form the triploid Primary Endosperm Nucleus (PEN) which will develop into the endosperm. Since this process involves the fusion of three haploid nuclei, it is known as triple fusion.