The freemartin condition represents the most frequent form of intersexuality found in cattle,
and occasionally other species. This review considers the current state of knowledge of …

Twinning in cattle ranges from about 1% for beef breeds to about 4% for dairy breeds. The
incidence of double births may have both positive and negative effects, which mainly …

Genomic scans were conducted with 273 markers on 181 sires from a cattle population
selected for increased twinning rate to identify chromosomal regions containing genes that …

We have investigated the use of sperm cells as vectors for transferring exogenous DNA into
the genome of cattle by artificial insemination with DNA‐treated sperm. First we …

A heifer co-twin to a bull, in most cases, is a sterile freemartin which needs to be identified
and culled from replacement stock. Various methods are available for the diagnosis of …

A polymerase chain reaction (PCR) assay which detects a sex-based polymorphism in the
bovine amelogenin locus was modified and compared to conventional cytogenetic analysis …

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 …

Development of molecular biology during the past three decades has created new
oppurtunities for the selection and genetic improvement of livestock. DNA markers have …

The phenomenon of chimaerism occurs in the majority of cattle twin pregnancies. The
objectives of this study were to develop a powerful diagnostic test for chimaerism in bovine …

Heterosexual chimerism among singleton females produced by multiple nonsexed embryo
transfer (MNET singleton females) was investigated using chromosome typing and PCR …