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Related Experiment Videos

Chromosome complexity in the Indian long-tailed tree mouse

K L Prakash, N V Aswathanarayana

    The Journal of Heredity
    |July 1, 1976
    PubMed
    Summary

    The Indian long-tailed tree mouse, Vandeleuria oleracea nilagirica, has a diploid chromosome number of 2n=28. This study reveals a simple XX/XY sex chromosome system in this rodent species.

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    Behavior of sex chromosomes during meiosis in the house shrew.

    The Journal of heredity·1984

    Area of Science:

    • Cytogenetics
    • Mammalian genetics
    • Rodent biology

    Background:

    • The karyotype of Vandeleuria oleracea nilagirica, the Indian long-tailed tree mouse, requires detailed investigation.
    • Understanding rodent chromosome structure is crucial for evolutionary and conservation studies.

    Purpose of the Study:

    • To determine the diploid chromosome number and sex chromosome mechanism in Vandeleuria oleracea nilagirica.
    • To analyze sex chromosome polymorphism within the species.

    Main Methods:

    • Karyological analysis of somatic cells from both male and female specimens.
    • Microscopic examination of chromosome morphology and number.

    Main Results:

    • The diploid chromosome number (2n) for Vandeleuria oleracea nilagirica was established as 28.
    • A straightforward XX/XY sex chromosome determination system was identified.
    • Observed sex chromosome variations were documented for further discussion.

    Conclusions:

    • The karyotype of Vandeleuria oleracea nilagirica is characterized by 2n=28 and an XX/XY sex determination system.
    • These findings contribute to the understanding of sex chromosome evolution in rodents.
    • Further research into sex chromosome polymorphism can illuminate evolutionary dynamics in related taxa.

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