The purpose of this study was to investigate the effects of tutorial and edutainment software programs related to "genetic concepts" topic on student achievements, misconceptions and attitudes. An experimental research design including the genetic concepts achievement test (GAT), the genetic concept test (GCT) and biology attitude scale (BAS) was applied at the beginning and at the end of the research. After the treatment, general achievement in GAT increased in favor of experimental groups. It was also noticed that using edutainment software programs significantly changed students' attitudes towards biology. However, only tutorial design software program had the positive effect to the awareness of students' understandings to the concepts gene, DNA, nucleus, chromosome, allele, genetic information, and genetic code. The current study also revealed that there were still some misconceptions in the experimental groups even after the treatment. (Contains 4 tables.)