Only deleterious mutations (positive s values) were assumed for the effects on fitness, and lethal mutations were not included in the analysis.
The author reported that the lethal effect of testosterone was because it ' stiffens the blood vessels'.
On crossing, therefore, the viability and the number of lethal equivalents due to them return to the original values of the ancestral population.
Thus began the first influx of weaponry more lethal than the spears which had previously served as instruments of hunting and raiding.
There is no evidence of a cosmic intruder of sufficient size to be lethal.
Indeed, as long as lethal palliation is permitted, those distinctions cannot even place withdrawing life-sustaining treatment and active euthanasia on different sides of the line.
Consequently, inbreeding depression due to lethal mutations remains unchanged for all levels of gene flow, and results are almost identical to those for single populations.
In the present experiments ifosfamide was tested for induction of dominant lethal and specific-locus mutations in germ cells of male mice.
