monocephalus thoracopagus is a kind of attached symmetrical twin in which two nearly complete individuals joined front-to-front in the thoracic region with a single head, fused chests, one or two hearts and two lower bodies. a died female kid goat with one head, four ears, four paired limbs and two more or less complete body was referred to the veterinary faculty of the shahid bahonar universit...

The twin method assumes that the trait under study is similar in twins and singletons so that the results from twin samples can be generalized to the singleton population. The purpose of the present study was to compare self-concept in twins and singletons matched in parental level of education. The 6 cluster scales of the Piers-Harris Children's Self-Concept Scale (P-H) were administered to 63...

OBJECTIVE Cannabis use, particularly at an early age, has been linked to suicidal thoughts and behavior, but minimal work has examined the association between cannabis use and lifetime nonsuicidal self-injury (NSSI). The current study aims to characterize the overlap between lifetime and early cannabis use and NSSI and to examine genetic and environmental mechanisms of this association. METHO...

A fifth instance of Crohn's disease in identical twins is reported. The evidence for genetic expression of the disease is considered and the possible mechanisms involved are reviewed.

This paper presents investigations into the ability of speaker verification technology to discriminate between identical twins. It is shown that whilst, in general, the genetic and non-genetic characteristics of voice are both of value to speaker verification capabilities, it is the latter which is highly beneficial in the separation of the speech of identical twins. It is further demonstrated ...

SIR,-Dr Phillips questions (April 17, p 1008) the value of twin studies in estimating the genetic component in the most common diseases of adult life. He points out that the intrauterine environment of twins, monozygous as well as dizygous, may be different and that this distinction may account for later differences in disease prevalence between co-twins. Thus, a greater concordance between mon...

We compared the nature of the sibling relationship in dyads of varying genetic relatedness, employing a behavioural genetic design to estimate the contribution that genes and the environment have on this familial bond. Two samples were used-the Sisters and Brothers Study consisted of 173 families with two target non-twin children (mean ages = 7.42 and 5.22 years respectively); and the Twins, Fa...