Question:

Primary endosperm nucleus (PEN) is formed by the fusion of

Updated On: Jul 28, 2022
  • 2 polar nuclei + 1 synergid cell nucleus
  • 1 polar nucleus + 1 antipodal cell nucleus + 1 synergid cell nucleus
  • 2 polar nuclei + 1 male gamete nucleus
  • 2 antipodal cell nuclei + 1 male gamete nucleus
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The Correct Option is C

Solution and Explanation

During the event of double fertilisation in angiosperms, the second male gamete fuses with the two haploid polar nuclei or diploid secondary nucleus of the central cell to form a triploid primary endosperm nucleus (PEN). This second fertilisation is called vegetative fertilisation.
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Concepts Used:

Pollination and Double Fertilization

Pollination is defined as the pre-fertilization event or process, where pollen grains from another are transferred to the stigma of a flower.

Double fertilization is a complex process that involves the fusion of one female gametophyte with two male gametes.

Types of Pollination:

All plants having flowers completely rely on the pollination method for reproduction. There are 2 types of pollination –

  • Self Pollination
  • Cross-Pollination

The end products of double fertilization are:

  • Diploid Zygote
  • Primary Endosperm Nucleus