Development of the posterior crossvein in crossveinless-like
strains of Drosophila melanogaster can be influenced by high temperature
shocks at specific times in pupal development.
Three sensitive periods were detected in age response studies
on Ona X, Ona II, 5-hi III; crossvein restoration at 14 hours in
pupal development, a crossvein...
This investigation is concerned with the determination of the temperature-effective period (T.E.P.) for crossvein development at physiological temperatures using three isogenic crossveinlesslike (cvl) lines of Drosophila melanogaster.
The method used to determine T.E.P. relies on temperature differences in phenotypes and on a program of transfers from one temperature to another...
The frequency of exchanges was measured in a reversed
acrocentric compound X chromosome that is deficient for interstitial
heterochromatin. Previous studies on similar chromosomes
containing interstitial heterochromatin have demonstrated a very
low frequency of single exchanges, and high frequencies of the
double and no exchange classes. It has been postulated...