No abstract

The teaching of genetics faces constant problems with the methods employed by biology teachers in basic education. In addition, it is noted that this is one of the difficult to understand subjects, missing connecting concepts and subjects for students at different educational levels. Thus, the objective was to build and propose the use of conceptual maps applicable to the teaching of genetics. From studies conducted in specialized bibliographies, two maps of concepts related to genetics were built in order to be further tested as facilitating instruments in the teaching-learning process. The first concept map was built with fundamental concepts about genetic material, DNA and RNA, with genomic information associated with prokaryotes, eukaryotes and viruses. In relation to the second map, it was built on the basis of information about the pathways by which DNA molecules express the information they conduct within the cell, or will transmit that information to another cell or another organism. Both maps were developed with fluid and comprehensive reading, which can be used as facilitating tools for teaching and learning of traditional and current genetics content.

This study aimed to define a methodology that, when combined with temperature, can overcome the dormancy and also to determine the adequate substrate and light conditions for germination of Colubrina glandulosa Perkins, contributing to seed analysis and restoration projects. In the experiment of dormancy and temperature, seeds were immersed in sulfuric acid for 30, 60, 90, 120 and 150 minutes and set to germinate at temperatures of 20-30 °C, 25 °C and 30 °C. The used substrates were sand, vermiculite, Tropstrato ® substrate, coconut powder, blotting paper and paper towel. As for the light supplied, the seeds were subjected to four luminosity regimes: white light, far-red light, red light and light absence. Temperatures of 20-30 °C and 30 °C achieved better results, with exposure in sulfuric acid for 120 and 150 minutes. The substrates sand and vermiculite were the most suitable. The species germinated in all light regimes treatments used.