RATES OF SPONTANEOUS MUTATION IN THE SECOND CHROMOSOMES OF THE SIBLING SPECIES, DROSOPHILA PSEUDOOBSCURA AND DROSOPHILA PERSIMILIS

Abstract
Th Dobzhansky, B Spassky, N Spassky; RATES OF SPONTANEOUS MUTATION IN THE SECOND CHROMOSOMES OF THE SIBLING SPECIES, DROSOPHILA PSEUDOOBSCURA AND DROSOPHILA PER