(1) This study detected deficiencies in ir-LHRH in the anterior hypothalamus of eyeless mutants.
(2) The results of protein, phospholipid and enzyme analyses were corroborated by analyses by 'genetic dissection' using an eyeless mutant line.
(3) A mutation that causes adult eyelessness (e eyeless, nonlethal, recessive) affects the earliest event in eye development (stage 1a), while a mutation that causes arrest of eye development (mi microphthalmic, lethal, recessive) acts in a later event (stage 8).
(4) These observations suggest a possible utility of the eyeless mutant axolotl for studies concerned with endocrine development in the absence of hypothalamic modulation.
(5) This arrangement was not observed in eyeless embryos.
(6) The transient expression of n alpha nAChR gene does not take place in the optic tectum of 'eyeless' embryos.
(7) On a Western blot, the antibody recognizes a 41 kDa protein that is present in the heads of yellow white flies, but not in the heads of eyeless mutant flies, eyes absent.
(8) Muscle proteins were quantified in the 1 M LiCl-soluble and distilled water-insoluble fraction of the eyeless, brainless, eviscerated and skinned carcass, as compared with a striated muscle sample from the same animal used as standard and processed in the same way as the whole carcass.
(9) The eyeless subjects showed no blanching (thus remained dark) in white cups, and they exhibited melanin spots 7 or 8 times the size of those of the other two groups.
(10) Prospective anterolateral neural fold was grafted from normal axolotls into the posterior neural fold region (statocyst area) of eyeless mutant hosts.
(11) These unilateral anteroposterior grafts stimulated bilateral eye formation in the eyeless mutant at a rate of 79%.
(12) Histological examination looking for paraldehyde-fuchsin-positive secretory neurons revealed a paired nucleus preopticus in both normals and eyeless mutants, but this region lacked the emanating paraldehyde-fuchsin-positive fiber tracts in eyeless mutants.
(13) Eyeless mutants also expressing a neural mutation were entrained by light:dark (LD) cycles, but their activity pattern in LD was changed compared to the wild-type and the eyeless mutant so.
(14) Brief heating of the oocytes and larvae of eyeless mutants during the critical periods of faceted-eye development caused an increase in the thermal sensitivity of the eye rudiments, which led to an increase in the number of one-eyed individuals among the flies that hatched.
(15) Thirty generations of selection for directional asymmetry of eye size was practiced on a stock of D. melanogaster homozygous for the mutant eyeless-recessive.
(16) Immunochemical studies were done to look at the distribution of immunoreactive luteinizing-hormone-releasing hormone (ir-LHRH) in brains of eyed and eyeless mutant axolotls of different stages.
(17) The eyeless-Dominant (eyD) mutation is a fourth chromosome insertional translocation which affects the eyes, antennae, ocelli, and sexcombs when heterozygous but is a larval-pupal lethal when homozygous.
(18) The aim of the present study was to determine the cellular site of eyeless-I (ey-I) and eyeless-2 (ey-2) gene action, causing anophthalmia or microphthalmia.
(19) The major morphological difference observed in the hypothalamus of normals compared to eyeless mutants was the reduced nature or complete lack of a preoptic recess in eyeless mutants.
(20) A model depicting 2 horizontally positioned black spots resembling facing eyes, as compared with models depicting other spot arrangements, elicits intense flight activity in young African jewel fish (Hemichromis bimaculatus) under 5 months of age and 7-month-old subadults reared apart from conspecifics with eyeless cave fish (Anoptichthys jordani).
Sightless
Definition:
(a.) Wanting sight; without sight; blind.
(a.) That can not be seen; invisible.
(a.) Offensive or unpleasing to the eye; unsightly; as, sightless stains.
Example Sentences:
(1) How odd that we see those bizarre creatures of the Stygian depths, with their eerie antennae and sightless eyes, and regard them as alien, when they are, after all, our distant ancestors.
(2) Nineteen sightless children and adolescents aged between 11 and 18 years were tested for physical condition and performance.
(3) The study of sightless walking on unstable ground (mattress) gives a clinical sight of the vestibular impairment long after the acute phase.
(4) It is concluded that a well-designed, adapted physical education programme, in four sessions per week, is sufficient to ensure a normal level of physical condition for sightless children.
(5) Subcutaneous injection of formoguanamine (2,4-diamino-s-triazine) induced sightlessness in newly hatched chicks within 28-32 hr.