Variation is the differences between individuals of the same species, caused by genetic and environmental factors. Surveys into variation give data that are continuous, which means to come in a range, ...

FOR us who have grown up since 1859, the doctrine of the Origin of Species has become so far one of those things quod semper, quod omnibus, quod ubique creditum est, that we waken from our dogmatic ...

ONE of the greatest differences between genetics to-day and genetics of thirty years ago is to be found in the changed attitude of geneticists towards the relation of a gene to the character, or ...