Which organism is ideal to study stage of allelic segregation?
Identifying stage segregation occurs requires organism where all four meiosis products remain together and spatial orientation reflects meiosis I versus meiosis II division order clearly. Neurospora crassa provides linear asci where spore order indicates whether homologous centromeres separated at first division carrying alleles together or heterozygosity persisted until second division due crossover. Pea, Drosophila, mouse gametes separate immediately after meiosis preventing stage determination by inspection. Therefore Neurospora ideal model for studying timing allelic segregation, centromer
Ref: Griffiths et al., Introduction to Genetic Analysis, 12th ed., Chapter 5: Neurospora Model for Segregation Timing
