Chromosome studies on heterosexual twins in cattle. I. Sexchromosome chimerism (XX-XY).

Chromosome studies on heterosexual twins in cattle. 3. Sex-chromosome chimerism (XX/XY) in bone marrow specimens.

Chromosome studies on heterosexual twins in cattle. II. Significance of sex-chromosome chimerism (XX-XY) in early diagnosis of freemartin.

Sex-chromosome chimerism (XX-XY) in heterosexual bovine triplets.

Blood chimerism in a dizygotic dichorionic pregnancy.

Blood chimerism in twins is known to occur through the transfer of hematopoietic stem cells between the fetuses via a common placenta. We present a case of blood chimerism in a dizygotic dichorionic twin pregnancy. The female twin was delivered at 34 weeks of gestation, and the male twin was stillborn. Pathologic examination confirmed dichorionic diamniotic placentas. The karyotype of the femal...

Cytogenetics and Molecular Genetic Analysis of Chimerism in Marmosets (Callithrix: Primates).

The birth of fraternal twins is a characteristic frequently observed in callitrichids. Cytogenetic studies have demonstrated hematopoietic chimerism in marmosets with the occurrence of two cell lines 2n=46,XX/46,XY in females and males co-twins, without phenotypic changes. Amplification by PCR have also been used to verify the presence of the SRY gene in female chimaeras. Our aim was to verify ...