Wide Variability In Sex Chromosomes Of Some Ophidians From UT Of Jammu And Kashmir
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Abstract
Cytogenetic studies were carried out on 11 species of Indian Snakes collected from Jammu region using Air Drying Technique of Gorman et al 1979. Among all E. johni and E. conicus belonging to primitive family Boidae exhibits diploid number, 2n=34 with undifferentiated sex chromosomes in both male and female. In family Colubridae ( an intermediate family) there exist huge variation as far as sex chromosomes are concerned i.e Ptyas mucosus has 2n=34, Oligodon arnensis has 2n=44 with undifferentiated sex chromosomes, Lycodon arnensis and Boiga trigonata both have 2n=36 with differentiated sex chromosomes(as per literature) while Natrix stolata has 2n=36 with distinct ‘ZW’ female. In Family Elapidae Naja naja naja has 2n=38 with undifferentiated sex chromosomes but Bungarus caerulus has 2n=44 with ‘ZW’ female having submetacentric ‘Z’ and largest telocentric ‘ W’ but members of family Viperidae viz. Vipera russelli and Echinis carinatus both have 2n=36 with well differentiated ‘ZW’ where ‘W’ is smaller and ‘ Z’ larger representing final step in the evolution of sex chromosome
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References
Becak , W., Becak, M.L., 1969- Cytotaxonomy and chromosomal evolution in serpents. Cytogenetics, 8: 247-262.
Becak, W., Becak, M.L., and Nazirath H.R.S., 1962- Karyotypic studies of 2 species of South American Snakes (Boa constrictor amarali and Bothrops jararaca). Cytogenetics, 1: 305-313.
Becak, W., Becak M.L., Nazirath H.R.S and Ohno, S. 1964-Close karyological kinship between the reptilian suborder Serpentes and the class Aves. Chromosoma (Berl), 15:606-617.
Gorman, G.C and Atkin, L., 1966- Chromosomal heteromorphsm in some male lizards of the genus Anolis,American Natyralist. 100:579-583.
Gorman, G.C and Atkin L. And Holinzer t, 1967-New karyotype data on fifteen genera of Lizards in the family Iguanidae, with a dusscussion of taxonomic and cytological implications. Cytogenetics, 6:286-299.
Levan, A., Fredha, K., and Sandberg, A.A., 1964-Nomenclature for centromeric position on chromosomes. Hereditas, 52:201-220.
Ohno, S., 1967- Sex chromosome and sex linked genes, Sringer Vrlag Berlin, Heidelberg and New York.
Ray-Chaudhuri, S.P., Singh, L., and Sharma, T. 1972. Evolution of sex chromosomes and formation of W- chromatin in snakes. Chromosoma 33: 185-236.
Sharma and Kour, 2005. On the Chromosomes of four species of Indian Snakes, Cytologia, 70(1):65-70.
Sharma and Kour, 2005. Karyology of four Indian snakes, Caryologia 58(4): 380-386.
Singh, L., 1972Evolution of Karyotype in Snakes. Chromosoma 38:185-236. Sharma BD (1998) Snakes in India, a source Book 87 Asiatic Publishing House
Singh, L., Sharma, T, RayChoudhary, S.P, 1970 Chromosome number and sex chromosomes in few Indian species of amphibian and reptilian, Mamm Chro Newslett 11, 91-94.
Choppadandi, Ashok, Jagbir Kaur, Pradeep Kumar Chenchala, Varun Nakra, and Pandi Kirupa Kumari Gopalakrishna Pandian. "Automating ERP Applications for Taxation Compliance using Machine Learning at SAP Labs." International Journal of Computer Science and Mobile Computing 9, no. 12 (December 2020): 103-112. Available online at www.ijcsmc.com.
Chenchala, Pradeep Kumar, Ashok Choppadandi, Jagbir Kaur, Varun Nakra, and Pandi Kirupa Gopalakrishna Pandian. "Predictive Maintenance and Resource Optimization in Inventory Identification Tool Using ML." International Journal of Open Publication and Exploration (IJOPE) 8, no. 2 (July-December 2020). Available online at: https://ijope.com.
Karuturi, S. R. V., Satish, Naseemuddin Mohammad. "Big Data Security and Data Encryption in Cloud Computing." International Journal of Engineering Trends and Applications (IJETA) 7, no. 4 (2020): 35-40. Eighth Sense Research Group.
Chintala, S. (2018). Evaluating the Impact of AI on Mental Health Assessments and Therapies. EDUZONE: International Peer Reviewed/Refereed Multidisciplinary Journal (EIPRMJ), 7(2), 120-128. ISSN: 2319-5045. Available online at: www.eduzonejournal.com
Chintala, S. (2019). IoT and Cloud Computing: Enhancing Connectivity. International Journal of New Media Studies (IJNMS), 6(1), 18-25. ISSN: 2394-4331. https://ijnms.com/index.php/ijnms/article/view/208/172
Kanungo, S. (2020). Decoding AI: Transparent Models for Understandable Decision-Making. Journal of Propulsion Technology, 41(4), 54-61.207https://ijmirm.com in
Kaur, Jagbir, Ashok Choppadandi, Pradeep Kumar Chenchala, Varun Nakra, and Pandi Kirupa Gopalakrishna Pandian. "AI Applications in Smart Cities: Experiences from Deploying ML Algorithms for Urban Planning and Resource Optimization." Tuijin Jishu/Journal of Propulsion Technology 40, no. 4 (2019): 50-56.
Kanungo, S., & Kumar, P. (2019). Machine Learning Fraud Detection System in the Financial Section. Webology, 16(2), 490-497.
Kanungo, S. (2019). Edge-to-Cloud Intelligence: Enhancing IoT Devices with Machine Learning and Cloud Computing. International Peer-Reviewed Journal, 2(12), 238-245. Publisher: IRE Journals.