5-10 hw solutions (genetics,nervous system).pdf

5-10 hw solutions (genetics,nervous system).pdf - LIFE...

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© Gauteng Department of Education 1 LIFE SCIENCES SSIP TEACHER NOTES AND SUGGESTIONS FOR SESSIONS 5 14 Please print a copy of the Life Sciences 2015 CAPS Exam Guidelines and ensure that you are familiar with all the exam requirements. We have tried to follow the exam guidelines in the selection of typical exam questions so that they align to these requirements. Enjoy your teaching. SESSION 5 Learners MUST understand the link between meiosis and genetics. During the crossing over in prophase I of chromosomes share information and then during metaphase I, separate randomly . This determines the combination of chromosomes and genes that you have as an individual. Genetics determines individual variation (to be different) and survival of the fittest. They MUST have a clear understanding of the genetic terminology in order to study genetics and answer genetic problems. Mendel’s Laws are very important - understand the concepts of dominance and how this plays a role in monohybrid crosses (mono = one = one characteristic or trait). Be aware o f confusing the word ‘cross/ crossing’ with ‘crossing over’ in Meiosis. Cross individuals and calculate the chances of a characteristic or trait being in the offspring. Learners must be clear of the difference between these two terms. Questions on blood group inheritance and sex determination are often asked. The more examples of genetic crosses that they do, the better they will do. Pedigree charts are a popular way to express family history and are often asked in exams. Make sure they know how to answer them. There are basically FOUR crosses . If they know these crosses, they will be okay.
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