Their macromolecules are so alike that regulatory mutations may account for their biological
differences. evidence concerning the molecular basis of evolution at the organismal level …

In the past two decades, molecular investigations of systematic problems have progressed
from uncommon curiosities to a standard means of elucidating phylogenetic history. This …

Character congruence, the principle of using all the relevant data, and character
independence are important concepts in phylogenetic inference, because they relate …

The study of geographic variation and the racial affinities between populations is of central
importance to systematics and evolutionary theory. When using phenotypic variation to …

Studies of evolution and systematics are so intimately linked that there should not be any
clearcut borderline between them. The major distinction, if any, probably lies in the aims of …

To test the hypothesis that the evolution of organisms is dependent to a large degree on
gene rearrangement, we devised a way of estimating rates of evolutionary change in …

We have compared the relative rates of protein evolution and chromosomal evolution in
frogs and mammals. The average rate of change in chromosome number has been about 20 …

Abstract Mickevich, MF, and MS Johnson (Centre de Recherches Mathematiques, Universite
de Montreal, Montreal, PQ, Canada and Department of Ecology and Evolution, State …

Comparisons of albumin indicate that the frogs commonly used by North American
molecular and developmental biologists under the name of Xenopus muelleri belong to …

Genetic diversity in remnant populations of the Sonoran topminnow Poeciliopsis
occidentalis (Pisces: Poeciliidae) from Arizona, where the species is endangered, is …