11. Microtubule organization in the cytoskeleton has been shown to be essential for proper nuclear congression during karyogamy . 12. Each teliospore undergoes karyogamy ( fusion of nuclei ) and meiosis to form four haploid spores called basidiospores. 13. It involves karyogamy , the formation of a zygote, which is followed by meiosis and multiple fission. 14. Defective microtubule organization causes total failure of karyogamy , but does not totally interrupt meiosis and spore production in yeast. 15. A basidiocarp is formed in which club-like structures known as basidia generate haploid basidiospores after karyogamy and meiosis. 16. Thus, karyogamy is the key step in bringing together two sets of different genetic material which can recombine during meiosis. 17. Teliospores consist of nuclei undergo karyogamy and thereafter meiosis, giving rise to a four-celled basidium with haploid basidiospores. 18. Thus, karyogamy is the key step in bringing together a variety of genetic material in order to ensure recombination in meiosis. 19. Unlike in animals and plants, plasmogamy is not immediately followed by the merging of the nuclei ( called " karyogamy " ). 20. According to the current understanding, R . A . Harper reported the observation of a second karyogamy event in the ascogonium prior to ascogeny.
