The association of abnormal chromosome constitutions and disorders of sex development in
domestic animals has been recorded since the beginnings of conventional cytogenetic …

In cattle, nearly all heifers born co-twin to a male are freemartins, XX/XY chimeras that
exhibit a characteristic masculinized phenotype. However, in sheep, while litters containing …

Gonadal dysgenesis and heterosexual conditions are often associated with sex
chromosome abnormalities. In this study we report on 2 cases of abnormal sex development …

The external phenotype and reproductive behaviour of 21 freemartin sheep and two male
pseudohermaphrodite sheep were recorded with the aim of identifying any characteristics …

Pedigree analysis of 22 heterosexual litters demonstrating the leukocyte chimerism (XX/XY)
was carried out. The analysis revealed the familial occurrence of the chimerism in 15 litters …

Cytogenetic studies of a closed herd of Booroola Merino sheep were carried out over six
consecutive years and covered 167 (90 females and 77 males) sheep originating from 77 …

The clinical effects of twenty different chromosome anomalies in sheep are reviewed. It is
concluded that not all anomalies give rise to reproductive problems or phenotypic variations …

Cytogenetic analysis was carried out in a total of 59 females and 45 males from 48 litters of
Merino Booroola sheep. Karyotypes were investigated only in sheep coming from multiple …

This article aims at presenting an important issue in animal fertility. XX/XY chimerism occurs
in various animal species and also in humans. It may arise as early form, resulting from …

El síndrome Freemartin se puede definir como una hembra estéril, nacida juntamente con
un macho, en un parto múltiple. Aunque este síndrome ha sido ampliamente descrito en …