title: Karyologic observations on the maturation of the summer and winter eggs of Daphnia pulex and Daphnia middendorffiana.
mesh_terms: D000818:Animals; D002842:Chromatids; D002875:Chromosomes; D003582:Cytogenetics; D003621:Daphnia / Q000166:cytology*; D004171:Diploidy; D005260:Female; D005828:Genetics, Population; D007621:Karyotyping; D008540:Meiosis; D010063:Ovum / Q000166:cytology*; D010312:Parthenogenesis; D012621:Seasons