And the fish had a backbone; until then, most large-scale studies of genes and development had been done in invertebrates.
To date, most large-scale studies of the genomics of disease have focused on specific portions of the genome, uncovering hundreds of variations that raise the risk of common ailments, including diabetes, heart disease, and schizophrenia.
Such analysis could be very challenging at global scale and for that reason previous studies have taken place only on regional/local scales7,13,67; while most large-scale studies do not consider cyclone effects3.
Most large-scale studies on transnational families restrict their focus to children whose migrant parents are in a stable union in order to isolate the sole effects of migration on children's health (Donato & Duncan, 2011; Wen & Lin, 2012).
Perhaps, the easiest phenotype to measure in yeast is cell growth or viability, and most large-scale studies of the gene deletion collection have focused on it.
Although small-scale experimental studies have examined the effects of nature on children's behaviors, most large-scale studies have been conducted in adult populations [ 35- 37].
Most large-scale studies in this area tend to be cross-sectional, and retrospective and prospective studies have often parochial, small samples and suffer from differential loss to follow-up.
Most large-scale studies on parity and parental ages suggest an effect on the sex ratio of birth order and paternal age, and in some studies, also of maternal age (summarised in Jacobsen et al, 1999).
In fact, most large-scale studies of d N/d S detect negative selection (the reduction of genetic diversity due to the elimination of deleterious mutations) on nearly all genes (Allen et al., 2007; Petersen et al., 2007).
Whole genome sequencing has the capability of providing researchers the identity of every variant contained within the genome; however, it may still be too expensive (∼$1,500 2,000 per sample for sequencing only, not including data analysis) for most large-scale studies and may generate more data than required.
