(n.) An extinct flying reptile; one of the Pterosauria. See Illustration in Appendix.
Example Sentences:
(1) Afterward she looked at the extras and asked: ‘Do you want to make a pterodactyl?’ Without hesitating I said: ‘Yes, I do.’
Tailless
Definition:
(a.) Having no tail.
Example Sentences:
(1) These experiments show that distinctly localized activities of huckebein and tailless are responsible for the appropriate expression of other genes known to be under the control of the terminal system.
(2) The isolation of hexagonal-headed, tailless, bacteriophage-like particles from uninduced cultures of Clostridium tetani is described.
(3) Successful multiplication of the tailless RNA 3 was accompanied by the reappearance of new 3' poly(A) tails on the progeny.
(4) To examine the influence of the head and tail domains on the structure and assembly properties of nuclear lamins, we have engineered "headless," "tailless," and "rod" chicken lamin B2 cDNAs and expressed them in Escherichia coli.
(5) Within this hunchback-free domain the pattern of abdominal segments must be specified by other morphogens, possibly by shorter range gradients of the products of zygotic gap genes Kruppel, knirps and tailless.
(6) In addition, the BRE pattern requires input from other segmentation genes, among them tailless and fushi tarazu but not Krüppel and knirps.
(7) The ascidian Molgula oculata has a tailed (or urodele) larva, whereas Molgula occulta develops directly via a tailless (or anural) embryo.
(8) The recessive zygotic lethal mutation tailless maps to region 100A5,6-B1,2 at the tip of the right arm of chromosome 3, and results in shortened pharyngeal ridges in the head skeleton of the mature embryo and the elimination of the eighth abdominal segment and telson.
(9) Mating experiments showed that the tailless character was due to an interaction between the T gene and an autosomal recessive gene carried by the MOL-NIS strain that expresses the short tail character under the homozygous condition.
(10) Clinical evaluation, radiographic analysis of the vertebral column and histological studies of the digestive tract and central nervous tissue were conducted to determine the association of malformations of these systems in cats born with different degrees of taillessness noted in the rumpy and stumpy cats.
(11) All the haplotypes described are viable in homozygotic state and when present with T (Brachyury) cause the offspring to be tailless.
(12) Unlike most ascidians, which develop into a swimming tadpole larva (urodele development), M. occulta eggs develop into a tailless slug-like larva (anural development) which metamorphoses into an adult.
(13) Tailed and tailless devices were surgically inserted into into the uterus by two different routes: surgically, directly into the uterine horn, thus avoiding contact with the vaginal and cervical microfloras, or via the vagina and cervix.
(14) of the tail bud of tailless and the tail of tailed mammals.
(15) It is hypothesized that the problems associated with the tailless condition such as spina bifida, urinary and faecal incontinence and locomotor disturbances of the pelvic limbs may all be related to a disturbance affecting the development of the central nervous system in the early embryonic life.
(16) Whereas dimers made of the truncated B2 headless and rod lamins had lost their propensity to associate head-to-tail, tailless lamin B2 dimers revealed an enhanced head-to-tail association.
(17) Consistent with its effect on ectodermal segments, tailless leads to a reduction in the number of segmented, paired ganglia in the ventral nerve cord as well as to an abrupt alteration in the posterior region of the tracheal system.
(18) Since the lateral mobility of the tailless Ly-2 molecules on the cell surface was nearly identical to that of the wild-type Ly-2 molecules, their partially impaired function may indicate that they have lost their cis-acting signaling properties but retained their ability to bind class I products of the major histocompatibility complex.
(19) The primary response to the terminal signal in the posterior end of the embryo is likely to be the activation of the gap genes huckebein and tailless.
(20) However, when expressed at high levels, such "tailless" mutant receptors could provide chicken embryo fibroblasts with sufficient iron from diferric human transferrin to support a normal rate of growth.