1 biology preamble
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| G. Adaptation for survival and Evolution. 1. Behavioural Adaptations in Social Animals. a) Termites b) Bees Reference should be made to dominant and recessive characters in plants and animals. Candidates should observe chromosomes in permanently prepared slides of cells and root tips of onion or lily. Candidates should study the structure of DNA and gene replication using models and charts. Segregation of genes at meiosis and recombination at fertilization should be used to explain the process of transmission of hereditary characters from parents to offspring. Computation of probability is not required. Explanation of the terms linkage, sex determination and sex linked characters such as haemophilia, colourblindness, baldness and hairy earlobes. Data on crossbreeding experiments should be studied. Examples of new varieties of crops and livestock obtained through crossbreeding should be mentioned. The advantages and disadvantages of cross-fertilization, out and inbreeding should be explained. The application of knowledge of heredity in marriage counseling with particular reference to sickle cell anaemia and rhesus factor should be mentioned. 22 2. Evolution. a) Evidence of evolution. (b) Theories of evolution Download 371.5 Kb. Share with your friends:
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