| The concept of dominance and recessiveness is not particularly relevant in X-linked inheritance. |
| I don't think that anything is known yet about the number, position, dominance, co-dominance or recessiveness of genes for behavior. |
| Still he did not pretend to generalize the relation of dominance and recessiveness to be that of presence and absence. |
| Consequently recessiveness of the two mutations is well established. |
