Study on Reproductive Disorders Related to Chromosome Abnormalities in Domestic Animals

Abstract

There are many types of chromosome abnormalities in domestic animals and these abnormalities are closely related to the reproductive disorders. From the results reported, the author proposes that chromosome abnormalities are divided into four Groups: Group A is made up of cases that have abnormal chromosomal structures(translocation, inversion)and show relative sterility; Group B contains cases that have normal chromosomal karyotypes(XY female, intersex)and show absolute sterility; Group C contains cases with an increasing or decreasing number of chromosomes(trisomy, monosomy)and show absolute sterility; Group D contains cases with sex chromosomal chimerism(freemartin)as well as absolute sterility. Because the cases from these groups are accompanied by characteristic gene abnormalities, these cases would be useful model in order to resolve the mechanism of gene function in domestic animals.