Some genetically determined traits, such as ear lobes, finger hair and hairy car were studied in 89 schizophrenic patients and compared with normals. The proportion of schizophrenic males having earlobes hanging free was much less than the control group. This difference is highly significant statistically (p < .0001). Similar was our observation in schizophrenic females (p < .05). Furthermore n...

S cience rarely allows the " is " —the way the world is—to become the " ought " of the way we think it should be. However, one particular aspect of modern biology may be of interest in this respect, namely, the history of our own genetic inheritance. As has been so often said, human evolution is the greatest story in history. We will use our own work on red hair and skin type genetics as an exa...

In this review article we summarize current knowledge on how variation on the DNA level influences human pigmentation including color variation of iris, hair, and skin. We review recent progress in the field of human pigmentation genetics by focusing on the genes and DNA polymorphisms discovered to be involved in determining human pigmentation traits, their association with diseases particularl...

Hair color is one of the most visible and heritable traits in humans. Here, we estimated heritability by structural equation modeling (N = 20,142), and performed a genome wide association (GWA) analysis (N = 7091) and a GCTA study (N = 3340) on hair color within a large cohort of twins, their parents and siblings from the Netherlands Twin Register (NTR). Self-reported hair color was analyzed as...

Genome-wide association studies (GWAS) to date have discovered thousands of genetic variants linked to human diseases and traits, which hold the potential to unravel the mechanisms of complex phenotypes. However, given that the majority of these associated variants reside in non-coding genomic regions, their predicted and -regulatory functions remain largely undefined. cis trans Here we show th...

The aims of this study were to investigate genotypic variations in root traits at phytomer level of wheat varieties and for recommending a few root traits as selection parameters in future breeding programs. Two separate experiments were conducted to measure their root traits for hydroponically grown wheat plants. In Experiment 1, main axis length, root hair density and diameter differed from p...

Subjects rated the (dis)similarity of pair-wise combinations of female and male salesperson realtors. The selected realtors represent the range of appearance features, in terms of physical traits, grooming, and adornment. Subject responses were analysed using multidimensional scaling (MDS) to generate male and female perceptual maps, with 19 female and 19 male realtors shown as points in their ...

Eumelanin (brown/black melanin) and pheomelanin (red/yellow melanin) in human hair can be quantified using chemical methods or approximated using spectrophotometric methods. Chemical methods consume greater resources, making them less attractive for epidemiological studies. This investigation sought to identify the spectrophotometric measures that best explain the light-dark continuum of hair c...

Women's preferences for men's masculinized faces and voices were assessed after women (n = 331) were primed with images of male-on-male aggression, male-on-female aggression, pathogens, and neutral scenes. Male-on-male aggression and pathogen primes were associated with increased preference for masculine traits, but the same effect emerged in the neutral condition. We show the increased prefere...