THE GENETICS OF ARTEMIA SALINA. I. THE REPRODUCTIVE CYCLE

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Abstract
The 1st analysis of an inherited trait governed by one locus in the brine shrimp. The autosomal gene, r, for red eyes has complete penetrance in homozygotes and is recessive to the wild type allele, R, for black eyes. The standard culture method outlined here has carried the mutant stock through 10 generations in a 1 year period. Reproduction was studied in two races from California and Utah. Neither parthenogenesis nor paedogenesis was observed in shrimp raised by the standard method. Matings of RR males to rr females indicate the Utah shrimp do not reproduce by pseudogamy. Although the adults may clasp continuously throughout the reproductive cycle, copulation occurs only when eggs are in the oviducts. Females do not store sperm from one cycle to the next.

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