Question:

Formation of gametophyte directly from sporophyte without meiosis is

Updated On: Aug 5, 2024
  • apospory
  • apogamy
  • parthenogenesis
  • amphimixis.
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The Correct Option is A

Solution and Explanation

Formation of gametophyte directly from sporophyte without meiosis and spore formation is apospory. The gametophyte thus has diploid number of chromosomes. Such gametophyte may form viable gametes which fuse to form tetraploid sporophyte. Apogamy is development of sporophyte directly from gametophytic tissue without fusion of gametes. Amphimixis is normal sexual reproduction. Parthenogenesis is development of embryo from egg without fertilization.
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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