title: The possible role of genome activity changes in the sex determination of Daphnia pulex.
abstract: Sex-dependent differences in the state of the nuclear chromatin of somatic cells were found in Daphnia pulex. It is suggested that the genome of Daphnia pulex has two developmental programmes based on identical chromosome sets. The female programme consistently functions under a wide range of ecological conditions, whereas the male programme is turned on by specific ecological stimuli. The genes controlling the activation and function of the male programme may be phenotypically latent for many parthenogenetic generations.
authors: Siberian Department, Institute of Cytology and Genetics of the U.S.S.R. Academy of Sciences, Novosibirsk, U.S.S.R..
authors: A O
authors: AO
authors: Ruvinsky
authors: S F
authors: SF
authors: Cellarius
authors: Y G
authors: YG
authors: Cellarius