Corinna already had one child with a genetic disorder that left him unable to sweat or grow teeth normally. The disorder -- X-linked hypohidrotic ectodermal dysplasia -- primarily affects boys and can ...

Fascination with twins and what twin studies tell us about human nature is universal. There is no question that behavioral and medical science advances have happened largely because twins yield a ...

Singer revealed twin girls, born in May, have been diagnosed with spinal muscular atrophy, which causes muscle weakness and ...

In the ongoing debate over nature versus nature, twin studies have given a glimpse into the role of genes in behavior and decisions. Psychologist... Twins are a mirror to each other – and a window ...

A novel study of twins who have significant intrapair differences in body mass index (BMI) shows that in the majority of cases, the twin with the higher BMI is the one that veers from their genetic ...

When we think of identical twins, we often imagine mirror images — same face, same smile and perhaps even the same talents. But what surprises many is that these genetic carbon copies can have ...

Identical and fraternal twins can provide insight into the effects of nature and nurture on factors such as eye color, intelligence, and autism. The environment can sometimes "override" genetic ...