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Chromosome abnormalities in early chicken (Gallus domesticus) embryos

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Chromosome studies were undertaken to determine if early embryonic mortality in chicken (Gallus domesticus) embryos is associated with chromosome aberrations. A rapid cytological technique was developed for screening large numbers of embryos for euploidy and aneuploidy. — Of 115 embryos examined, 6 or 5.2% had aberrant chromosome complements. All of these chromosome aberrations occurred in embryos that were phenotypically abnormal. Of 45 macroscopically abnormal embryos, 13.3 % were chromosomally aberrant. These included two cases of haploidy (A-Z), one case of trisomy-1, a case of trisomy-2 and two cases of triploidy (3A-ZZW and 3A-ZWW). — Possible modes of origin for euploid and aneuploid embryos are discussed and consideration given to the significance of these aberrations in relation to embryo viability, constancy of chromosome numbers and nucleolar organization.

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Bloom, S.E. Chromosome abnormalities in early chicken (Gallus domesticus) embryos. Chromosoma 28, 357–369 (1969). https://doi.org/10.1007/BF00284932

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  • Developmental Biology
  • Chromosome Number
  • Chromosome Abnormality
  • Chromosome Aberration
  • Nucleolar Organization