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260 results for “parthenogenetic”
Fig. 4 in Natural Hybridization Between the Teiid Lizards Cnemidophorus tesselatus (Parthenogenetic) and C. tigris marmoratus (Bisexual): Assessment of Evolutionary Alternatives
Fig. 4. Representatives of Cnemidophorus tesselatus from the Arroyo del Macho hybridization site. A. AMNH R146615 (91 mm SVL); B. AMNH R146618 (83 mm SVL); C. AMNH R146619 (85 mm SVL); D. AMNH R146623 (86 mm SVL); E. AMNH R146627 (89 mm SVL); F. AMNH R 146626 (90 mm SVL).
Fig. 2 in Natural Hybridization Between the Teiid Lizards Cnemidophorus tesselatus (Parthenogenetic) and C. tigris marmoratus (Bisexual): Assessment of Evolutionary Alternatives
Fig. 2. Dorsolateral views of three representative whiptail lizards (Cnemidophorus) from Arroyo del Macho. A. Diploid unisexual C. tesselatus, AMNH R146638, body length 97 mm. B. Triploid C. tesselatus X C. tigris marmoratus hybrid male, AMNH R146693, body length 100 mm. C. Diploid bisexual C. tigris marmoratus male, AMNH R146653, body length 94 mm. All photographed June 19, 1998.
Fig. 9 in Natural Hybridization Between the Teiid Lizards Cnemidophorus tesselatus (Parthenogenetic) and C. tigris marmoratus (Bisexual): Assessment of Evolutionary Alternatives
Fig. 9. Karyotypes of two whiptail lizards (Cnemidophorus) from Arroyo del Macho. A. Diploid unisexual C. tesselatus, AMNH R146638 (2n = 46). This unisexual taxon is a clone with its ultimate ancestor being an F1 hybrid between C. tigris marmoratus (haploid complement of chromosomes in the upper two rows) X C. gularis septemvittatus (haploid complement in the lower two rows). Large arrow points to the centromere of the Xchromosome ultimately inherited from C. tigris marmoratus; this chromosome apparently had undergone centric fission into two telocentric chromosomes in the other karyotypic clone of C. tesselatus found at the same locality (2n = 47). B. Triploid hybrid between C. tesselatus X C. tigris marmoratus (male), AMNH R146690 (3n = 69). The four rows of chromosomes above the scale bar represent the two haploid complements inherited from C. tigris marmoratus, whereas the lower two rows represent the single haploid complement from C. gularis septemvittatus. The Ychromosome was inherited from the most recent backcross hybridization between C. tesselatus and C. tigris marmoratus. Bar represents 10 µm. Small arrows in both A and B illustrate distinctive secondary constrictions (nucleolar organizer regions) from C. gularis septemvittatus.
Fig. 1. A. A in Natural Hybridization Between the Teiid Lizards Cnemidophorus tesselatus (Parthenogenetic) and C. tigris marmoratus (Bisexual): Assessment of Evolutionary Alternatives
Fig. 1. A. A view to the east showing the principal gypsum outcrop and southfacing slope at the hybridization locality north of Roswell, Chaves County, New Mexico. Scattered dark shrubs in the center of the figure are mesquite (Prosopis juliflora) in a desert grassland; C. exsanguis and C. inornatus were
Fig. 17 in Natural Hybridization Between the Teiid Lizards Cnemidophorus tesselatus (Parthenogenetic) and C. tigris marmoratus (Bisexual): Assessment of Evolutionary Alternatives
Fig. 17. Oviduct structure of hybrid females (A–D) and C. tesselatus females (E–H). A. Distal oviduct showing thin mucosa and absence of folds (AMNH R145147, slide 8, row 1, section 1). B. Middle oviduct with alveolar glands (AMNH R145147, slide 8, row 1, section 1). C. Middle oviduct showing poorly developed alveolar glands (AMNH R145146, slide 11, row 2, section 2). D. Middle oviduct (AMNH R146691, slide 9, row 2, section 6, MT). E. Distal oviduct showing mucosa and variation in fold development (AMNH R145143, slide 5, row 2, section 6). F. Distal and middle oviducts; note the swollen (active) posterior part of the distal oviduct and the distinctive appearance of the middle oviduct. The proximal oviduct is not visible (AMNH R145142, slide 136, row 1, section 2). G. Middle oviduct with mucosa and welldeveloped alveolar glands (AMNH R145142, slide 80, row 1, section 2). H. Middle oviduct showing serosa, mucosa, and organization of the alveolar glands (AMNH R145142, slide 85, row 1, section 4). Scale bar, 0.01 mm, except F, which is 1 mm, and H, which is 0.1 mm.
Fig. 21. A in Natural Hybridization Between the Teiid Lizards Cnemidophorus tesselatus (Parthenogenetic) and C. tigris marmoratus (Bisexual): Assessment of Evolutionary Alternatives
Fig. 21. A monthly comparison of size distributions and reproductive status of individuals of Cnemidophorus tesselatus collected at the Arroyo del Macho hybridization site in 1996–1999.
Fig. 19 in Natural Hybridization Between the Teiid Lizards Cnemidophorus tesselatus (Parthenogenetic) and C. tigris marmoratus (Bisexual): Assessment of Evolutionary Alternatives
Fig. 19. Testes of hybrid males (A–C, G, H) and C. tigris males (D–F). Note that G and H are out of sequence because of size. A. Testis with sperm (AMNH R145145, slide 5, row 2, section 3). B. Testis with debris and few sperm (AMNH R146683, slide 10, row 1, section 4). C. Seminiferous tubules
Fig. 23 in Natural Hybridization Between the Teiid Lizards Cnemidophorus tesselatus (Parthenogenetic) and C. tigris marmoratus (Bisexual): Assessment of Evolutionary Alternatives
Fig. 23. Generations of Cnemidophorus tesselatus X C. tigris marmoratus hybrids and of C. tesselatus inferred from snout–vent length data (mm) in samples collected at Arroyo del Macho in 1996– 1999. For each year depicted, the May–October activity period is included, and each horizontal line representing a lizard extends from the estimated year and month of hatching to the year and month of collection. Sex of each hybrid (M or F) is indicated.
Fig. 16 in Natural Hybridization Between the Teiid Lizards Cnemidophorus tesselatus (Parthenogenetic) and C. tigris marmoratus (Bisexual): Assessment of Evolutionary Alternatives
Fig. 16. Ovary structure of hybrid females (A–D) and C. tesselatus females (E–H). A. Ovary with abnormal follicle (AMNH R145146, slide 5, row 1, section 4). B. Ovary with empty follicle and abnormal follicular epithelia (AMNH R145147, slide 16, row 1, section 1). C. Detail of follicle wall of empty follicle (AMNH R145147, slide 16, row 1, section 1). D. Empty follicle with blood supply (AMNH R146681, slide 4, row 1, section 2). E. Ovary with oogonia and several sizes of developing
Fig. 18 in Natural Hybridization Between the Teiid Lizards Cnemidophorus tesselatus (Parthenogenetic) and C. tigris marmoratus (Bisexual): Assessment of Evolutionary Alternatives
Fig. 18. Mesonephros of hybrid females (A, B), C. tesselatus (C, D), hybrid males (E–G), and a C. tigris male (H). A. Mesonephros showing small and large tubules (AMNH R145147, slide 8, row 2, section 6). B. Adrenal gland with large and small mesonephric tubules (AMNH R145146, slide 11, row 1, section 2). C. Ovary and adrenal with small mesonephric tubules; no large tubules present (AMNH R146640, slide 4, row 1, section 1). D. Mesonephros with small tubules; no large tubules present (AMNH R146629, slide 10, row 1, section 4). E. Large tubules (= epididymis) and small mesonephric tubules; debris does not include sperm (AMNH R145148, slide 8, row 1, section 6). F. Epididymis and small mesonephric tubules (AMNH R146695, slide 25, row 3, section 6). G. Vas deferens and small mesonephric tubules (AMNH R146692, slide 12, row 2, section 6, MT). H. Large mesonephric tubules and epididymis (packed with sperm) and small mesonephric tubules (AMNH R 146653, slide 10, row 2, section 4). Scale bar, 0.1 mm, except G, which is 0.01 mm.
Fig. 15 in Natural Hybridization Between the Teiid Lizards Cnemidophorus tesselatus (Parthenogenetic) and C. tigris marmoratus (Bisexual): Assessment of Evolutionary Alternatives
Fig. 15. Germinal epithelium and adjacent adrenal gland of hybrid females (A–C) and C. tesselatus females (D–F). A. Germinal epithelium with welldefined lip, margin, and oogonia (AMNH R146689, slide 3, row 2, section 6, MT). B. Detail of epithelium in figure 15A (AMNH R146689, slide 3, row 2, section 6, MT). C. Germinal epithelium, adrenal gland, and mesonephros (AMNH R146691, slide 13, row 2, section 9). D. Germinal epithelium showing boundary and lip (AMNH R146637, slide 41,
Fig. 22. A in Natural Hybridization Between the Teiid Lizards Cnemidophorus tesselatus (Parthenogenetic) and C. tigris marmoratus (Bisexual): Assessment of Evolutionary Alternatives
Fig. 22. A monthly comparison of size distributions of Cnemidophorus tesselatus X C. tigris marmoratus hybrids collected at the Arroyo del Macho hybridization site in 1996–1999.
Fig. 5. Representative Cnemidophorus tesselatus X C. tigris marmoratus hybrid females from the Arroyo del Macho hybridization site. A. AMNH R146689 in Natural Hybridization Between the Teiid Lizards Cnemidophorus tesselatus (Parthenogenetic) and C. tigris marmoratus (Bisexual): Assessment of Evolutionary Alternatives
Fig. 5. Representative Cnemidophorus tesselatus X C. tigris marmoratus hybrid females from the Arroyo del Macho hybridization site. A. AMNH R146689 (89 mm SVL); B and E. AMNH R146687 (93 mm SVL); C and F. AMNH R146688 (91 mm SVL); D. AMNH R146681 (84 mm SVL).
Fig. 13 in Natural Hybridization Between the Teiid Lizards Cnemidophorus tesselatus (Parthenogenetic) and C. tigris marmoratus (Bisexual): Assessment of Evolutionary Alternatives
Fig. 13. Electrophoretic phenotypes of PEPA, a dimeric enzyme, for 12 lizards; letters and labeling as in figure 11, except asterisk marks hybrid (AMNH R145146) that received the callele from MAR instead of the ballele (coincidentally, this is the only hybrid karyotyped that has a fissioned Xchromosome). The callele occurs in other individuals of MAR, the dallele in others of both MAR and SEP. Anode is to the right.
Fig. 20. A in Natural Hybridization Between the Teiid Lizards Cnemidophorus tesselatus (Parthenogenetic) and C. tigris marmoratus (Bisexual): Assessment of Evolutionary Alternatives
Fig. 20. A comparison of body size (snout–vent length) and gravid status of female individuals of Cnemidophorus tesselatus and body size of male and female C. tesselatus X C. tigris marmoratus hybrids collected from the Arroyo del Macho hybridization site in 1996–1999.
FIGURE 2 in Karyotypes of the North American Parthenogenetic Whiptail Lizard Aspidoscelis velox, and Return of Aspidoscelis innotatus to the Synonymy of A. velox (Reptilia: Squamata: Teiidae)
FIGURE 2. Chromosomes of four individuals of the triploid Aspidoscelis velox. A. The original unmodified karyotype (K1), with 3 + 36 + 30 = 69 chromosomes; from UAZ 18743. B. The Set I macrochromosomes of karyotype K2, in which one of the original Set I metacentrics apparently underwent centric fission, resulting in 2 + 38 + 30 = 70 chromosomes; from UAZ 21647. C. The Set I macrochromosomes of karyotype K3, in which two of the Set II chromosomes apparently had undergone centric fusion, resulting in 4 + 34 + 30 = 68 chromosomes; from AMNH R-128317. D. The Set I macrochromosomes of karyotypes K4–K6, in which another pair of Set II chromosomes apparently underwent centric fusion, resulting in 5 + 32 + 30 = 67 chromosomes in K4, followed by additional modifications in K5 and K6 (not illustrated; see text); from AMNH R-115954. Note that there is only one clear secondary constriction (NOR) in each, subterminal on one arm of a Set I metacentric chromosome. Scale bar represents 10 microns.
FIGURE 1 in Karyotypes of the North American Parthenogenetic Whiptail Lizard Aspidoscelis velox, and Return of Aspidoscelis innotatus to the Synonymy of A. velox (Reptilia: Squamata: Teiidae)
FIGURE 1. Representatives of two population samples of Aspidoscelis velox. A. Adult female from Kane County, Utah, AMNH R-178713, previously referred to A. innotatus; snout-vent length = 84 mm. This individual had karyotype K1. B. Adult female from Sandoval County, New Mexico, AMNH R-127247; snout-vent length = 78 mm. This individual had karyotype K4.
Fig. 18 in Hybridization Between Parthenogenetic Lizards (Aspidoscelis neomexicana) and Gonochoristic Lizards (Aspidoscelis sexlineata viridis) in New Mexico: Ecological, Morphological, Cytological, and Molecular Context
Fig. 18. Electrophoretic phenotypes of five proteins as expressed on separate gels. PEPA, a dimeric enzyme, for three lizards. LDH1, a tetrameric enzyme, for three lizards. ESTD, a dimeric enzyme, for three lizards. sMDH, a dimeric enzyme, for four lizards. TF, a monomeric enzyme, for six lizards; white dots mark the three isozymes from the hybrid. Letters below gel identify allozymes based on alleles present (table 13). Lanes for individual lizards are labeled beside the gel (with genotype) as follows: I, A. inornata; M, A. tigris marmorata; N, A. neomexicana; NC, A. neomexicana from Conchas Lake; NF, A. neomexicana from Fort Sumner; N 3 S, the hybrid; S, A. sexlineata viridis. Anode is to the right, ^ indicates relative position of sample applications.
Fig. 17 in Hybridization Between Parthenogenetic Lizards (Aspidoscelis neomexicana) and Gonochoristic Lizards (Aspidoscelis sexlineata viridis) in New Mexico: Ecological, Morphological, Cytological, and Molecular Context
Fig. 17. Karyotype of a triploid whiptail lizard (AMNH R151739; 3n 5 69) from Conchas Lake, San Miguel County, New Mexico. This is a hybrid between A. neomexicana 3 A. sexlineata viridis. The three haploid genomes (two rows of chromosomes each) are arranged to illustrate ancestry of the hybrid, as follows: A. tigris marmorata (top) 3 A. inornata (middle), which were inherited from the diploid maternal parent of the hybrid (A. neomexicana), and A. sexlineata viridis (bottom), from the paternal parent. Bar 5 10 mm.
Fig. 16 in Hybridization Between Parthenogenetic Lizards (Aspidoscelis neomexicana) and Gonochoristic Lizards (Aspidoscelis sexlineata viridis) in New Mexico: Ecological, Morphological, Cytological, and Molecular Context
Fig. 16. Pattern of morphological distinctiveness expressed by the distribution of canonical variate scores derived from a linear canonical variate analysis of eight meristic characters in 49 A. neomexicana (Ơ), 26 A. sexlineata viridis (m 5? and M 5 /), 13 A. neomexicana 3 A. sexlineata viridis (v 5? and V 5 /), AMNH 144085 5 UADZ 3272 (3, assigned to the hybrid group as indicated by Walker et al., 1990), OMNH 35109 (1, assigned to the hybrid group as suspected by B.E. Leuck), and 26 A. tesselata C (n) from Conchas Lake, San Miguel County, New Mexico. Ellipses represent the 95% confidence limits of each group.
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Allen Brain Atlas
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International Brain Laboratory public data
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OpenNeuro
OpenNeuro is a free, open platform for sharing neuroimaging datasets, with public search, dataset pages, and download paths for web, S3, DataLad, and the OpenNeuro CLI.