La investigación realizada “Habilidades de precálculo en estudiantes de cinco años en una Institución Educativa Inicial Pública de Mi Perú,” tiene como objetivo determinar habilidades de precálculo que tienen los estudiantes de la institución mencionada, y el propósito de promover nuevas estrategias utilizadas por los maestros para mejorar las habilidades previas al cálculo de los estudiantes y continuar aprendiendo matemáticas con éxito en el siguiente nivel educativo. El tipo de investigación utilizada para el desarrollo de este tema es sustantiva descriptiva simple. En este estudio después de haber aplicado la prueba de precálculo a niños de cinco años se obtiene los siguientes resultados: Del total de niños evaluados el 6.7 % presentan un nivel medio en habilidades de precálculo y un 93.3 % presentan un nivel alto. En conceptos básicos el 3,3% presenta un bajo...

The non-recombination region of the human Y chromosome is a very informative genetic tool for unraveling the history of human populations. 105 individuals from four northern populations of Peru, were genotyped for three Y-specific loci: DYS287, DYS199 and DYS390. Only one individual carried the YAP+ /C lineage, more probably of African origin. The highest frequency of Amerindian Y chromosomes, represented by the YAP- / T lineage, was found in the Aguaruna population of Yamayakat (97%), decreasing gradually in the mestizo population of Moche (73%), Santiago de Chuco (53%) and Trujillo (33%); on the other hand, the admixture level was higher in north-western populations. The most frequent haplotypes were YAP- /C/24 in Trujillo (47%) and YAP- /T/24 in Santiago de Chuco (23%). The haplotype diversity was higher in Santiago de Chuco (0,881) than in Trujillo (0,752). It stands out in the propo...

The non-recombination region of the human Y chromosome is a very informative genetic tool for unraveling the history of human populations. 105 individuals from four northern populations of Peru, were genotyped for three Y-specific loci: DYS287, DYS199 and DYS390. Only one individual carried the YAP+ /C lineage, more probably of African origin. The highest frequency of Amerindian Y chromosomes, represented by the YAP- / T lineage, was found in the Aguaruna population of Yamayakat (97%), decreasing gradually in the mestizo population of Moche (73%), Santiago de Chuco (53%) and Trujillo (33%); on the other hand, the admixture level was higher in north-western populations. The most frequent haplotypes were YAP- /C/24 in Trujillo (47%) and YAP- /T/24 in Santiago de Chuco (23%). The haplotype diversity was higher in Santiago de Chuco (0,881) than in Trujillo (0,752). It stands out in the propo...