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The chromosomes of cryptobranchus allegheniensis
Author(s) -
Makino Sajiro
Publication year - 1935
Publication title -
journal of morphology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.652
H-Index - 74
eISSN - 1097-4687
pISSN - 0362-2525
DOI - 10.1002/jmor.1050580210
Subject(s) - biology , ploidy , genetics , evolutionary biology , chromosome , gene
The number and behavior of the chromosomes have been investigated in the spermatogenesis of Cryptobranchus allegheniensis. The spermatogonium contains sixty‐two chromosomes, which are composed of twelve atelomitic V‐shaped ones, and eighteen long and thirty‐two short telomitic ones. The haploid number of chromosomes is ascertained to be thirty‐one in both of the primary and secondary spermatocytes. The chromosomal relation between the present species and Megalobatrachus japonicus, a closely related form, has been discussed.