Bats display reciprocal altruism by sharing food; when a bat is unsuccessful in feeding, it solicits food from a roost-mate which regurgitates blood to feed its neighbor.
Overall, U2 14B/38ABa and U2 34ABb/34ABc display reciprocal expression trends during fly development.
Thus, CCR2-deficient, and ACKR2-deficient, mice display reciprocal dermal lymphatic vessel density phenotypes.
Wilson (1975) defines it as the tendency of individuals of the same species to live in groups and display reciprocal, cooperative behaviour.
Adams and Wendel [ 14] have shown that A- and D-genome allelic pairs at the Adh locus display reciprocal silencing across multiple tissues in two Gossypium F1 hybrids.
So, an increase in HIF-1alpha, as shown in the presented study, could display reciprocal effects in the analysed endothelial cells.
Conversely, mice that overexpress Tcf7l2 display reciprocal phenotypes, including increased plasma insulin levels and glucose intolerance due to peripheral insulin resistance, indicating that overexpression of Tcf7l2 leads to a type 2 diabetic phenotype (9).
The J-protein Ydj1 and the G1 cyclin Cln3 display reciprocal patterns of binding to Ssa proteins (Vergés et al., 2007), suggesting that Ssa1 T36 phosphorylation might affect Cln3 activity or expression.
In maize, crosses between diploid and tetraploid plants usually result in seed abortion [ 16], but before this occurs, the developing seeds also display reciprocal phenotypes, with delayed endoreduplication (i.e. delayed differentiation) observed in kernels with paternal excess, and early mitotic arrest when there is maternal excess [ 17].
