Abstract
Abstract The effect on chiasma frequency and localization of a supernumerary segment (S) found in the M9 chromosome in a population of Acrotilus insubricus was analyzed. Whereas chiasma frequency was not significantly increased in the M9/M9S heterozygotes, chiasma localization in the M9 chromosomes was considerably modified: in the M9/M9 individuals single chiasmata were mostly interstitial but they were almost exclusively proximal in the M9/M9S heterozygotes. Double chiasmata were rare in the heterozygotes and had always a proximal and distal localization. An increase of achiasmatic M9 chromosome was also found in the heterozygous individuals.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
