Cytological evidence of constant tetraploidy in the bisexual South American frog Odontophrynus americanus

Abstract

Odontophrynus americanus has 2n=44 chromosomes in somatic and gonad cells which can be ordered in 11 groups of homologues. In spermatocytes I they form mostly ring quadrivalents. In metaphase II 22 dyads are present. There is no indication of abnormalities in ♂ and ♀ gonad development. 
DOI: 10.1007/BF00293683

Topics

  • Presentations referencing similar topics