Apes and Old World monkeys descended from a more generalized anthropoid common ancestor that lacked the derived traits of either monkeys or apes (McNulty 2010).
In effect, the mean trait value of either sex is displaced from its optima.
In both rhizobium strain treatments, there were QTL that influenced multiple traits, indicative of either tight linkage between loci or pleiotropy, including one QTL with opposing effects on growth and reproduction.
This is particularly true in plant biology, since a considerable amount of information is now available allowing the linkage of traits to either genomic DNA sequences, ESTs or proteins for a wide range of different plant species (see for example Arabidopsis, [ 1]; Solanaceae [ 2]; Grasses,[ 3]; Legumes, [ 4]).
Understandably, they have a hard time imagining the mechanisms through which genes could have some effect but not complete control, and instead often consider a trait a result of either nature or nurture, but not both.
transgressive variation The appearance in the F2 (or later) generation of individuals showing more extreme development of a trait than either of the original parents.
Two contemporary commercial apple cultivars, 'Royal Gala' and 'Braeburn', were chosen as parents, as breeding populations derived from these individuals have produced new cultivars in which fruit firmness traits exceed those of either of the parents.
Because the outcome variable is the average rating of a trait of the subject either by the 20 female raters or by the 20 male raters, we include two observations for each subject one observation for the rating by female raters, and one observation for the rating by male raters.
Indeed, consider a study (fairly representative of the contemporary biomedical/genetic research in general) where one aims to find a gene influencing a certain human trait of interest via either hypothesis-driven (e.g. candidate gene) or data-driven (e.g. genome-wide association) approach.
In this study, we performed GWAS in the way of SNP by SNP individually via regressing the observations of a single trait on either the genotypes of a SNP (MMRA) or the allele transmission patterns of a SNP from bulls to corresponding half-sib offspring (L1-TDT).
