(1) Hybridization analyses of selected lines revealed that genes influencing aristal branching are located on both the X chromosome and the autosomes.
(2) A small sensory ganglion, from which arises the aristal nerve, is located proximally in the shaft.
(3) Selection was successful and resulted in two lines differing by an average of six aristal branches.
(4) These thermoreceptors are often coupled with hygroreceptors; however, we can only speculate whether the second dendrite of the aristal organ also has this function.
(5) It is concluded that the number of aristal branches in Drosophila is a neutral trait (i.e., not subject to natural selection) under laboratory conditions.
(6) Polygenic control of aristal morphology is indicated by a gradual response to selection and low realized heritabilities.
(7) Barrier was found to be related to aristic, expressive creativity which seems to be related to interest in human interactions, but unrelated to creativity associated with scientific endeavors and unrelated to creative receptivity (i.e., purest adaptive regression).
(8) Two populations of D. melanogaster were selected for increased and decreased numbers of major aristal branches.
(9) They lie in the center of the disc and correspond to the neurons of the adult aristal sensillum.
(10) The fine structure of the aristal sensory organ was studied in detail in the fruitfly (Drosophila) and for comparison in the housefly (Musca) and the blowfly (Calliphora).
(11) It is generally adopted that the homoeotic gene proboscipedia causes the transformation of the distal parts of proboscis into corresponding tarsal or antennal (aristal) segments.
(12) Correlations between aristal morphology and behavior found in other selection experiments by previous investigators were likely due to linkage disequilibria.
(13) The transformation of oral lobes of proboscic into the leg is most conspicuous at 29 degrees C, while at 16 degrees C the substitution of tarsal structures by aristal ones is observed more frequently.
(14) Shifts down yielded leg tissue at the aristal base, which retreated with later shifts.
(15) Sometimes the distal parts of the homoeotic leg (segments of tarsus, claws) can coexist with or be substituted for by the aristal filaments.
(16) This suggests that neither larval leg neurons nor early aristal neurons are essential for the outgrowth of subsequent afferents.
(17) In Drosophila, the aristal sense organ consists of 3 identical sensilla that terminate in the hemolymph space of the aristal shaft, and not in an external cuticular apparatus.
(18) The aristal sense organs in Musca and Calliphora are similar to those in Drosophila, but contain more sensilla (12 in Musca, 18 in Calliphora.
(19) When selection was relaxed for 19 generations, the number of aristal branches did not revert to the number in the control line.
(20) Changes in aristal branching did not appear to have a consistent influence on geotaxis, although there was a tendency for flies with fewer aristal branches to be geonegative.
Arista
Definition:
(n.) An awn.
Example Sentences:
(1) Other antennal mutants and flies with their aristae amputated do not show such extreme positive geotaxis.
(2) The arista, a characteristic appendage of dipteran antennae, consists of 2 short segments at the base and a long distal shaft.
(3) The TSP for ssa-40a overlapped the TSP for homoeotic transformation of aristae into tarsi but did not overlap the TSP for spineless effects.
(4) The homeotic mutant, ss(a40a), was found to have a temperature-sensitive transformation of the arista segment of the antennal complex to a tarsus of the leg.
(5) Friedman is 52, and grew up in California, where he attended Berkeley until he dropped out to become first a concert promoter, then a manager, and finally a talent scout for Arista.
(6) We report here the isolation and characterization of Aristapedioid, a gain of function mutation which causes a partial transformation of arista towards tarsus and the loss or decrease in size of the dorso-central and scutellar bristles.
(7) In 1999, after he condescended to play ball with the industry again via an Arista deal for the indifferent Rave Un2 the Joy Fantastic , I finally got to interview the guy.
(8) The aristae of Drosophila have been shown to play a role in mating behavior and geotaxis.
(9) Only one visible mutation was isolated, a recessive temperature-sensitive allele of Thickened-arista (Tarts).
(10) Heterozygous deficient females have most, if not all, of the Minute features (short and fine bristles, rough and somewhat larger eyes, thin-textured wings, missing aristae, affected antennae, delayed development, reduced fertility, and decreased viability).
(11) In a selected stock penetrance was complete, so that at 29 degrees C normal aristae were produced, whereas at 17 degrees C complete tarsi developed in all flies.
(12) The homeotic mutant spineless-aristapedia (ssa) transforms the arista into a leg-like tarsus.
(13) The homeotic mutation spineless-aristapedia (ss(a)) transforms the aristae into second tarsi.
(14) These results show that SSa females, although lacking aristae, could distinguish between the two types of males in that they mated more readily with males that sang.
(15) Charged with making a more straightforward album to appease his new label Arista, whose intervention had apparently saved him from bankruptcy, he made Rock and Roll Heart, which if it was pallid enough to get on mid-70s radio spoiled its chances of doing so with its lyrics: "I believe in the iron cross."