Monozygotic Twinning in Mice

Monozygotic Twinning in Mice.

Because of the predominance of multiple ovulation in mice, it has been generally accepted that evidence for monozygotic twinning would be difficult to obtain. The two attempts that have been made have failed to find any evidence for twins surviving birth at a measurable rate. In Fisher and Mather's (I936) sevenfold backcross experiment there is no evidence of twinning at all. In each of Bateman...

Monozygotic twinning, cerebral palsy and congenital anomalies.

BACKGROUND The majority of cases of cerebral palsy (CP) have their pathogenesis during fetal development and are a form of congenital anomaly, the aetiology of which is uncertain. Anomalous development of other organs evident at birth is also a congenital anomaly. A small proportion of these are known to be caused by chromosomal or gene abnormalities, environmental teratogens and dietary defici...

Monozygotic twinning: is it related to apoptosis in the embryo?

The advent of prolonged in-vitro preimplantation embryo culture using sequential culture media (Gardner et al., 1998) has permitted many IVF laboratories to successfully adopt blastocyst transfer. Unfortunately, an unexpected side effect of this success has seen a small but significant appearance of monozygotic twinning. This has now been described by several authors (Peramo et al. Curiously en...

A serological estimate of monozygotic twinning in sheep.

Induction of Monozygotic Twinning by Ascorbic Acid in Tobacco

Embryo development in plants initiates following the transverse division of a zygote into an apical, proembryo cell and a basal cell that gives rise to the suspensor. Although mutants affected in embryo development through changes in cell division have been described, little is known about the control of the first zygotic division that gives rise to the proembryo. Ascorbic acid (Asc) promotes c...