Meiosis in Coprinus
Chromosome pairing takes two steps: members of the homologous pair become aligned first and then “zip up” throughout their length. Initial contact may begin from one end or from both ends of the chromosomes. Prom late paehytene to diplotene, the chromosomes are somewhat elongated and exhibit lampbrush characteristics. This is followed by a diffuse stage in which the chromosomes are most indistinct. The centrosome divides at this time. The chromosome numbers are as follows: Coprinus lagopus, n=12; C. micaceus, n=12, C. comatus, n=14; and C. atramentarius, n=16.