Abstract
1. The existence of a difference in thorax size between the male offspring of reciprocal crosses of large and small selectedDrosophila strains was confirmed. A similar and larger difference was observed in wing length. These differences can be enlarged to a varying extent by lowering the temperature dining the larval or pupal or both stages. 2. The percentage of length increase is approximately the same for the thorax and the wing when temperature is kept low during the larval stage only. But the wing increase becomes six times larger than the thorax increase if the temperature is lowered during the pupal stage only. This is probably correlated to changes, in opposite directions, of the metabolic patterns in the primordia of the two organs. 3. The wing-length to thorax-length index increases with the lowering of temperature. This increase has been compared to the differences in this index appearing between various species of Drosophilidae.
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.
