文章基本信息

标题：Secondary school students' Alternative conceptions about genetics
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作者：Abdulwali H Aldahmash ; Mathematics Education ; Fahad S Alshaya 等
期刊名称：The Electronic Journal of Science Education
印刷版ISSN：1087-3430
电子版ISSN：1087-3430
出版年度：2012
卷号：16
期号：1
语种：English
出版社：Southwestern University
摘要：Alternative conceptions are considered as the most dominant factor in hindering students' learning and achievement in science. The aim of this study was to explore secondary students' alternative conceptions of concepts related to genetics and heredity. A sample of 186 students from Riyadh city, KSA, was randomly selected and given a valid and reliable written questionnaire. The results indicated that students hold many alternative conceptions about concepts related to genetics and heredity, which are:- direct and indirect cell division, reduction division, sexual and asexual reproduction, and the process of genetic information transfer. The results reviled also that secondary students have difficulty in differentiating between asexual and sexual reproduction. The results indicated also that there is an overlap in students understanding of the mechanisms of transferring genetics and heredity characteristics in reproduction and cell division. These types of alternative conceptions have weakened students' ability to explain their answers on the written questions. As a result, such misconception may hinder students' understanding of most of the biological concepts.
关键词：Alternative conceptions; heredity and genetics; reproduction; sexual & asexual reproduction; indirect division; reduction division; genetic information transfer; cell division