(a.) Having the sexes in two separate individuals; -- applied to plants in which the female flowers occur on one individual and the male flowers on another of the same species, and to animals in which the ovum is produced by one individual and the sperm cell by another; -- opposed to monoecious.
Example Sentences:
(1) The results apply to a dioecious population if the migration pattern and mutation rate are sex independent.
(2) The population is assumed to be infinite dioecious with nonoverlapping discrete generations and random mating.
(3) It is argued that the genome of R. acetosa is undergoing rapid reorganisation on this small island which may be associated with an enforced shift towards inbreeding in this dioecious species.
(4) The above results apply to autosomal loci in monoecious (with or without selfing) and dioecious populations and to X-linked loci.
(5) Seven centric shifts and three reciprocal interchanges, all newly-arisen in natural populations, have been tested for their inheritance in the dioecious flowering plant Rumex acetosa.
(6) Staurotypus does not confirm to the general model of sex chromosome evolution for diploid dioecious organisms.
(7) Thus the cost of sex in gynodioecious populations is (with a low level of selfing) as high as in a dioecious population.
(8) The technique has been successful in both dioecious and monoecious families with short chromosomes.
(9) Fluke LSU rRNA has significant sequence homology to mosquito mitochondria LSU rRNA and is more closely related to the mitochondrial rRNA of hermaphroditic than dioecious trematodes.
(10) Weak selection at a single mutiallelic locus in a dioecious population is analysed under the assumptions of panmixia and discrete non-overlapping generations.
(11) is fertilized by small biflagellate spermatozoids and both monoecious and dioecious species are found.
(12) This situation contrasts with the one described for another heterosporous haploid dioecious pteridophyte, Marsilea vestita, where nucleocytoplasmic interaction has been interpreted as the de novo creation of plastids and mitochondria following the elimination by autophagy of the organelles inherited at meiosis.
(13) Discrete, nonoverlapping generations are posited for autosomal and X-linked loci in dioecious populations, but monoecious populations are studied in both discrete and continuous time.
(14) The mean fitness is the product of the mean fertility and the mean viability; in dioecious populations, the latter is the unweighted geometric mean of the mean viabilities of the two sexes.
(15) Properties of identity relation between genes are discussed, and a derivation of recurrent equations of identity coefficients in a random mating, diploid dioecious population is presented.
(16) Chromosome analyses of 227 mature plants of the dioecious species Rumex acetosa collected on the small island of Skomer have revealed an extremely high level of unique and polymorphic variation.
(17) Study of the reproductive anatomy in 65 strobilae of the dioecious cestode Shipleya inermis Fuhrmann, 1908 (Acoleata: Dioecocestidae) showed that a common genital duct, probably arising through fusion of the vas deferens and the proximal portion of the vaginal duct, compensated functionally for the loss of a patent vagina.
(18) Using adequate definitions of mean fitnesses in general contexts of frequency-dependent selection in dioecious populations, we show that two phenotypes, when they can coexist in the population, tend to balance their fitnesses as far as is allowed by the genetic system as more alleles responsible for phenotype determination are introduced into the population.
(19) The plant is dioecious with very reduced male and female flowers.
Hermaphrodite
Definition:
(n.) An individual which has the attributes of both male and female, or which unites in itself the two sexes; an animal or plant having the parts of generation of both sexes, as when a flower contains both the stamens and pistil within the same calyx, or on the same receptacle. In some cases reproduction may take place without the union of the distinct individuals. In the animal kingdom true hermaphrodites are found only among the invertebrates. See Illust. in Appendix, under Helminths.
(a.) Including, or being of, both sexes; as, an hermaphrodite animal or flower.
Example Sentences:
(1) Several additional groups of muscle cells of more limited mass and spatial distribution include the vulval muscles of hermaphrodites, the male sex muscles, the anal-intestinal muscles, and the gonadal sheath of the hermaphrodite.
(2) These cells are also present in hermaphrodites, where they have minor structural roles in the rectum.
(3) Male sex determination in sporadic, and familial Y-ve XX males and true hermaphrodites is likely to be the result of mutation in an X-linked TDF gene and its consequent escape from the constraints of X-inactivation.
(4) Marking with feces was important in hermaphrodite-hermaphrodite interactions.
(5) We discuss the benefice of a such therapeutic option in the true hermaphroditism lately diagnosed recording to organic and psychological data.
(6) We propose that the wild-type xol-1 gene product promotes male development by ensuring that genes (or gene products) directing hermaphrodite sex determination and dosage compensation are inactive in XO animals.
(7) I don't think it is an easy thing to write and expect to be commercial, even if you are from Venus and a hermaphrodite."
(8) During induction of the Caenorhabditis elegans hermaphrodite vulva by the anchor cell of the gonad, six multipotent vulval precursor cells (VPCs) have two distinct fates: three VPCs generate the vulva and the other three VPCs generate nonspecialized hypodermis.
(9) An XX true hermaphrodite was examined for the presence of Y-specific sequences using Southern-blotting and polymerase chain reaction (PCR) techniques.
(10) The hypothesis provides an explanation for the observed bilateral asymmetry of gonadal differentiation in human hermaphrodites in terms of the bilateral asymmetry of growth of human fetal gonads.
(11) In true hermaphroditism ovarian or testicular tissue is present in the same patient; in false hermaphroditism female or male organs predominate; and in transsexualism only one way of alteration is possible i.e.
(12) The authors report the cases of two new families of true hermaphroditism (4 cases) defined by the coexistence of both testicular and ovarian tissues.
(13) A mutation in him-8 IV was identified that severely reduced recombination between the two X chromosomes in hermaphrodites and between mnDp73 and the X chromosome in males.
(14) In hermaphrodites, mnDp72 and mnDp73 promoted meiotic X nondisjunction and recombined with an X chromosome in the unc-1-dpy-3 interval at frequencies comparable to that found for X-X recombination; mnDp72(X;IV) also promoted trisomy for chromosome IV.
(15) Furthermore, the germ-line specificity of the fem-3(gf) mutant phenotype and the late temperature-sensitive period suggest that, in the wild-type XX hermaphrodite, fem-3 is negatively regulated so that the hermaphrodite stops making sperm and starts making oocytes.
(16) An unusual case of hermaphroditism in a 4 to 5-year-old roe is described.
(17) and Grassi Milano observed that when the female gonads were cultured without steroid or gonadotrophic hormones at the start of differentiation an hermaphrodite left ovary and a male right one were formed.
(18) Loss-of-function mutations in the spe-11 gene in Caenorhabditis elegans result in a paternal-effect embryonic-lethal phenotype: fertilization of wild-type oocytes by sperm from homozygous spe-11 mutant males leads to abnormal zygotic development, whereas oocytes from homozygous spe-11 hermaphrodites when fertilized by wild-type sperm develop normally.
(19) In wild-type Caenorhabditis elegans there are two sexes, self-fertilizing hermaphrodites (XX) and males (XO).
(20) Six out of 22 can transform XO animals into fertile females or hermaphrodites, whereas the remainder cause partial feminization.