Revised karyotype of Alouatta caraya (Primates: Platyrrhini) based on synaptonemal complex and banding analyses
Most primates studied have the usual XX/XY sex-chromosome system. However, exceptions to this rule among howler monkeys have been suggested by several authors. Recently a quadrivalent was discovered in male meiosis of Alouatta caraya and it was established that this species has an X1X2Y1Y2 sex chrom...
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todo:paper_00180661_v128_n1_p9_Mudry2023-10-03T14:15:13Z Revised karyotype of Alouatta caraya (Primates: Platyrrhini) based on synaptonemal complex and banding analyses Mudry, M.D. Rahn, M. Gorostiaga, M. Hick, A. Merani, M.S. Solari, A.J. article autosome chromosome banding pattern chromosome C band chromosome G band female karyotype male meiosis monkey nonhuman reciprocal chromosome translocation sex chromosome synaptonemal complex Alouatta Animals Chromosome Banding Karyotyping Male Spermatocytes Synaptonemal Complex Alouatta Alouatta caraya Platyrrhini Primates Most primates studied have the usual XX/XY sex-chromosome system. However, exceptions to this rule among howler monkeys have been suggested by several authors. Recently a quadrivalent was discovered in male meiosis of Alouatta caraya and it was established that this species has an X1X2Y1Y2 sex chromosome system. On that basis, a cytogenetic analysis of 25 males of this species is described. showing the corrected karyotype of this species. Each chromosome involved in the particular sex-chromosome system of this species is identified on the basis of mitotic chromosome measurements. G and C-banding patterns as well as on the relative measurements of synaptonemal complexes. It is now established that A. caraya has a karyotype with 2n = 52 in both sexes, and that the male one shows a single autosome 7 (X2) besides the X (X1) and the two products of the reciprocal translocation between the second autosome #7 and the Y chromosome (Y1 and Y2), while females show a homomorphic pair #7 (X2) and a pair of X1. The evolutionary implications of the exceptional primate species having composite sex-chromosome systems are discussed. Fil:Mudry, M.D. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Gorostiaga, M. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_00180661_v128_n1_p9_Mudry |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
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Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
article autosome chromosome banding pattern chromosome C band chromosome G band female karyotype male meiosis monkey nonhuman reciprocal chromosome translocation sex chromosome synaptonemal complex Alouatta Animals Chromosome Banding Karyotyping Male Spermatocytes Synaptonemal Complex Alouatta Alouatta caraya Platyrrhini Primates |
| spellingShingle |
article autosome chromosome banding pattern chromosome C band chromosome G band female karyotype male meiosis monkey nonhuman reciprocal chromosome translocation sex chromosome synaptonemal complex Alouatta Animals Chromosome Banding Karyotyping Male Spermatocytes Synaptonemal Complex Alouatta Alouatta caraya Platyrrhini Primates Mudry, M.D. Rahn, M. Gorostiaga, M. Hick, A. Merani, M.S. Solari, A.J. Revised karyotype of Alouatta caraya (Primates: Platyrrhini) based on synaptonemal complex and banding analyses |
| topic_facet |
article autosome chromosome banding pattern chromosome C band chromosome G band female karyotype male meiosis monkey nonhuman reciprocal chromosome translocation sex chromosome synaptonemal complex Alouatta Animals Chromosome Banding Karyotyping Male Spermatocytes Synaptonemal Complex Alouatta Alouatta caraya Platyrrhini Primates |
| description |
Most primates studied have the usual XX/XY sex-chromosome system. However, exceptions to this rule among howler monkeys have been suggested by several authors. Recently a quadrivalent was discovered in male meiosis of Alouatta caraya and it was established that this species has an X1X2Y1Y2 sex chromosome system. On that basis, a cytogenetic analysis of 25 males of this species is described. showing the corrected karyotype of this species. Each chromosome involved in the particular sex-chromosome system of this species is identified on the basis of mitotic chromosome measurements. G and C-banding patterns as well as on the relative measurements of synaptonemal complexes. It is now established that A. caraya has a karyotype with 2n = 52 in both sexes, and that the male one shows a single autosome 7 (X2) besides the X (X1) and the two products of the reciprocal translocation between the second autosome #7 and the Y chromosome (Y1 and Y2), while females show a homomorphic pair #7 (X2) and a pair of X1. The evolutionary implications of the exceptional primate species having composite sex-chromosome systems are discussed. |
| format |
JOUR |
| author |
Mudry, M.D. Rahn, M. Gorostiaga, M. Hick, A. Merani, M.S. Solari, A.J. |
| author_facet |
Mudry, M.D. Rahn, M. Gorostiaga, M. Hick, A. Merani, M.S. Solari, A.J. |
| author_sort |
Mudry, M.D. |
| title |
Revised karyotype of Alouatta caraya (Primates: Platyrrhini) based on synaptonemal complex and banding analyses |
| title_short |
Revised karyotype of Alouatta caraya (Primates: Platyrrhini) based on synaptonemal complex and banding analyses |
| title_full |
Revised karyotype of Alouatta caraya (Primates: Platyrrhini) based on synaptonemal complex and banding analyses |
| title_fullStr |
Revised karyotype of Alouatta caraya (Primates: Platyrrhini) based on synaptonemal complex and banding analyses |
| title_full_unstemmed |
Revised karyotype of Alouatta caraya (Primates: Platyrrhini) based on synaptonemal complex and banding analyses |
| title_sort |
revised karyotype of alouatta caraya (primates: platyrrhini) based on synaptonemal complex and banding analyses |
| url |
http://hdl.handle.net/20.500.12110/paper_00180661_v128_n1_p9_Mudry |
| work_keys_str_mv |
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| _version_ |
1782023531190550528 |