14 research outputs found
More Than a Footnote to History in Cultural-Historical Theory: The Zalkind Summary, Experimental Study of Higher Behavioural Processes, and “Vygotsky's Blocks”
No full textTRAINING IN LOGICAL THINKING AND ITS EFFECTS ON THE GROUPING STRATEGIES OF EIGHT-YEAR-OLD CHILDREN
No full textEsterases in the mosquito Culex pipiens pipiens L.: Formal genetics and polymorphism of adult esterases
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Seasonal changes in the genetic diversity of two rodent populations, Midday Gerbil (Meriones meridianus) and Northern Three-Toed Jerboa (Dipus sagitta), detected by ISSR
No full textSeasonal changes in genetic diversity of Meriones meridianus and Dipus sagitta populations in the Ningxia Hui Autonomous Region were monitored using inter-simple sequence repeats. There were 45 discernible DNA fragments isolated from 33 samples of M. meridianus, and 25 from 40 samples of D. sagitta. The differences in gene frequencies are statistically significant for some alleles. Nei’s index revealed that the greatest genetic differentiation was distributed within the seasonal groups. Nei’s and Shannon’s indexes exhibited similar seasonal trends,
indicating that the spring group has the highest level of genetic diversity and that genetic diversity changes with the seasons. Correlation analysis found no statistically significant correlation between genetic diversity and population density. The results suggest that the seasonal changes in genetic diversity of the two species depend mainly on reproduction and dispersal.Rong Zhou, You Li, Jia-Qi Li and Nai-Fa Li
Reliability of transferrin and leucine aminopeptidase phenotyping in wild meadow voles (Microtus pennsylvanicus)
No full textThe importance of deviation amplifying circuits for the understanding of the course of evolution
No full textGenetic variation in the genus Bufo I. An extreme degree of transferrin and albumin polymorphism in a population of the American toad (Bufo americanus)
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