Abstract: Immature gonads were taken from the abdominal cavity of M. albus treated withcolchicine solution. Observations were made on the metaphase of gonia mitosis, as well asvarious phases of meiosis had been inhibited. In anaphase I, No.9 chromosome separated inadvance. Formations of polyploid diakinesis and diploid nonreductive gamete were also observed. Karyotype of the fish was analyzed by studying the metaphase of initosis andsynaptinemal complex, The results were in agreement with those of published studies.