Question

Last stage of gametophytic generation is

• A. Gametes
• B. Zygote
• C. Spore mother cells
• D. Spores

Answer 1

Answer: (A)

Gametes

The gametophyte generation begins with a spore produced by meiosis. The spore is haploid, and all the cells derived from it (by mitosis) are also haploid. In due course, this multicellular structure produces gametes by mitosis and sexual reproduction then produces the diploid sporophyte generation. The sporophyte generation thus starts with a zygote. Its cells contain the diploid number of chromosomes. Eventually, though, certain cells will undergo meiosis, forming spores and starting a new gametophyte generation.