Practice question

Apomixis signifies alternative reproductive pathway where seeds form without meiosis and syngamy, producing offspring clonal to maternal parent preserving heterozygosity and hybrid genotype. Developmental routes include apospory where embryo sac initiates from somatic nucellar cell bypassing megaspore mother cell differentiation, diplospory where megaspore mother cell undergoes mitosis instead of meiosis forming unreduced embryo sac, and adventitious embryony where embryo develops directly from nucellar tissue. Unreduced egg cell then develops parthenogenetically via activation of egg cell transcription factors like BABY BOOM without sperm contribution. Endosperm formation may require pseudogamy where central cell still fertilized or autonomous where it develops spontaneously. Genetic control governed by apomixis-specific genomic region ASGR containing genes for apomeiosis and parthenogenesis, studied in Pennisetum and Hieracium. This understanding supports competitive exam preparation for NEET, GATE and CSIR NET concepts linking genotype with phenotype through molecular pathways involving transcription factors, hormones and metabolic enzymes that regulate development, adaptation and reproductive biology in applied breeding programs.