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Higher Biology - Unit 2 Genetics and Adaptation. In this unit you will hear about:-
Variation; Sexual reproduction as a means of enabling variation; Meiosis; The Dihybrid Cross; Linkage and crossing over; Linked genes; Crossing over; Sex linkage; Mutations; Mutant alleles; Mutagenic agents; Non disjunction; Polyploidy; Change in the structure of one chromosome; Alteration of base type or sequence; Selection and Speciation; Natural Selection; Survival of the fittest; The concept of the species; Isolating mechanisms; Adaptive radiation; High speed evolution; Conservation of species; Artificial Selection; Evolution of both crop plants and domesticated animals; Genetic engineering; Somatic fusion; Animal and Plant Adaptations; Maintaining a water balance; Adaptations of salmon and eels; Desert mammals; Plants; The transpiration stream; Stomatal mechanism; Adaptations in xerophytes and hydrophytes; Obtaining Food; Animals; Foraging behaviour and search patterns; Economics of foraging behaviour; Competition; Dominance hierarchy and co-operative hunting within the social group; Territorial behaviour; Plants; Coping with danger; Animals; Avoidance behaviour and habituation; Learning as a long term modification of response; Individual and social mechanisms for defence; Plants.
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