In our simplest model of a population with one life stage and density-dependent mortality, wave speed depends on the strength of drive and the diffusion rate of Y-drive males, and is independent of the population dynamic consequences (suppression or elimination).
Additional evidence that the force driving uptake sequence accumulation is weak comes from the correlation between codon-bias effects and uptake sequence reading frame use, which shows that the strength of drive favoring individual uptake sequences is comparable to the selection favoring use of optimal codons in a coding sequence (Hartl et al. 1994).
While learning and experience are recognized as conspicuous factors in the shaping of these behaviours, the theory also gives prominence to possibly inborn differences in the strength of drives and of the control processes.
Androgen seems linked in both males and females with aggressiveness and strength of sexual drive.
There is great variation among individuals in the strength of sex drive and responsiveness, so this necessary exercise of restraint is correspondingly difficult or easy.
Some researchers alleged a direct effect of knowledge of results, while others, such as American psychologist Clark L. Hull (Principles of Behavior, 1943), produced a complete account of learning based upon need reduction that is, reducing the strength of the drive linking stimulus and response under various experimental conditions.
Yet, despite the strength of this drive, males exhibit a period of sexual disinterest following ejaculation.
Other correlates of reproductive success were also investigated (preferred age at first child, frequency of sex, strength of sex drive, and how easily participants were sexually excited, etc).
The mechanism influences the strength of the drive to eat (feeding behaviour) and determines the level of hunger at the beginning of a meal (Fig. 1B).
The relevance of this finding is uncertain, but as SMARCB1 is a tumour suppressor gene, it may be a bystander effect and may again reiterate the strength of BRCA2 drive in MBCs.
The reason for the different steepness of activity onset could be a combination of the strength of synaptic drive, properties of individual synaptic responses, and intrinsic membrane properties of a cell (Llinás 1988; Wang et al. 2006; Cruikshank et al. 2007).
