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Related Experiment Videos

Filicidal ring-Y chromosomes in D. melanogaster.

J C Stone

    Genetics
    |October 1, 1982
    PubMed
    Summary

    Maternal genes influence the cleavage behavior of "filicidal" ring-Y chromosomes, causing embryonic disorganization and inviability. These genetic effects highlight complex Y chromosome instability.

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    Area of Science:

    • Genetics
    • Developmental Biology
    • Cytology

    Background:

    • Ring-Y chromosomes are infrequently recovered in specific crosses.
    • Previous research noted issues with ring-Y chromosome transmission.

    Purpose of the Study:

    • To investigate the genetic factors influencing ring-Y chromosome behavior during early development.
    • To understand the maternal effects on the viability of embryos carrying ring-Y chromosomes.

    Main Methods:

    • Crosses involving ring-Y bearing males and females of specific strains.
    • Cytological examination of inviable embryos.
    • Genetic mapping studies of the Y chromosome.

    Main Results:

    • A class of maternal-effect genes was identified that impact ring-Y chromosome cleavage.
    • Ring-Y chromosomes induce significant disorganization of cleavage nuclei in inviable embryos.
    • Embryonic inviability observed is comparable to dominant lethality seen with ring-X chromosomes.
    • No single Y chromosome region is solely responsible for the observed instability.

    Conclusions:

    • Maternal genes play a critical role in regulating the stability and transmission of ring-Y chromosomes.
    • Ring-Y chromosome instability leads to developmental defects and embryonic lethality.
    • The genetic basis for ring-Y chromosome behavior is complex and not localized to a single chromosomal region.

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