Genetic Engineering: Vectors Vectors are used to?transfer the desired genes?into a foreign cell Plasmids are the most commonly used vector but viruses and liposomes (a small vesicle with a phosphol...
Genetic Engineering: Enzymes Genetic engineering is the deliberate modification of a specific characteristic (or characteristics) of an organism. The technique involves?removing a gene?(or genes), ...
Isolating the Desired Gene The gene with the specific characteristic that is required can be obtained in the following ways: Extracting the gene from the DNA of a donor organism using enzymes (rest...
Genetic Engineering Explained Genetic engineering is a technique used to deliberately modify a specific characteristic (or characteristics) of an organism. The technique involves?removing a gene?(o...
Recombinant DNA The genetic code is?universal, meaning that almost every organism uses the same four nitrogenous bases – A, T, C & G. There are a few exceptions This means that the?same?codons?...
Role of IUCN & CITES in Conservation International cooperation?is essential if conservation is to be successful There are several agreements and authorities that exist within and between countr...
Controlling Invasive Species A species that has?moved into an ecosystem where it was previously unknown?is an invasive species An invasive species can occur naturally as a result of a species migra...
Assisted Reproduction Endangered mammals tend to have?small and isolated?populations Small populations are prone to?inbreeding?and inbreeding depression Inbreeding depression is the?reduction in fi...
Methods of Conservation An endangered species is a?species that is being threatened with extinction Conservation of endangered species can be approached in several different ways Ideally a species ...
Reasons for Maintaining Biodiversity Biodiversity is the?range and variety?of genes, species and habitats within a particular region It is made up of three components: Genetic diversity Species div...
Reasons for Extinction Extinction is when a?species comes to an end?or dies out Extinction is a natural biological process that happens on planet earth and studies of fossils and ancient DNA have s...
Simpson's Index Once the abundance of different species in an area has been recorded the results can be used to calculate the?species diversity?or biodiversity for that area Species diversity looks...
