Question

Which of the following is a non-recurrent apomixis?

• A. Amphimixis
• B. Haploid parthenogenesis
• C. Aneuspory
• D. Diploid parthenogenesis

Answer 1

The correct option is B Haploid parthenogenesis

• Amphimixis is actually the process of sexual reproduction, which involves meiosis and syngamy. By meiosis, diploid cells of sporophyte give rise to haploid gametophytes, which produce male and female gametes.
• Syngamy, i.e. fusion of haploid gametes, results in the restoration of the diploid sporophytic generation.
• Haploid parthenogenesis is the formation of an embryo from an unfertilized egg, thus forming a haploid embryo.
• Aneuspory is a kind of diplospory in which a megaspore mother cell produces embryo sac by mitosis instead of meiosis, thus producing a diploid embryo sac.
• Since non-recurrent apomixis is the direct development of the embryo from an unfertilized egg, therefore, Haploid parthenogenesis is non-recurrent apomixis.

So, the correct answer is 'Haploid parthenogenesis'.