title: The inheritance of albinism in a freshwater snail, Physa heterostropha.
abstract: Complementation tests revealed that albinism in four laboratory strains of Physa (Physella) heterostropha pomilia resulted from two recessive, nonallelic genes. F2 dihybrid progeny displayed the 9:7 ratio classically associated with reciprocal recessive epistasis between unlinked loci. This offers a contrast to the situation in the better known planorbid snails and provides a valuable tool for the study of reproductive biology in these facultatively self-fertilizing hermaphrodites.
authors.affiliation: Department of Biology, College of Charleston, SC 29424.
authors.forename: R T
authors.initials: RT
authors.lastname: Dillon
authors.forename: A R
authors.initials: AR
authors.lastname: Wethington
mesh_terms: D000818:Animals; D003433:Crosses, Genetic; D005127:Eye Color / Q000235:genetics; D005808:Genes, Recessive; D005816:Genetic Complementation Test; D008040:Genetic Linkage; D010858:Pigmentation / Q000235:genetics*; D012908:Snails / Q000235:genetics*