Variation

• selective breeding- humans choosing organisms to breed together that have a desirable characteristic to produce offspring more pronounced
• selective breeding- reduces gene pool, inbred animals
• different version of the same gene are alleles
• dominate alleles are expressed
• BB or bb= homozygous
• Bb= heterozygous
• natural selection answer stems 1- species ahve variation withing the population
• natural selection answer stems 2- theres competition for resources
• natural selection answer stems 3- those who are best adapted survive, reproduce and pass on their genes
• natural selection answer stems 4- until a whole population has evolved to have the same genes
• Darwins theory- random mutations result in variation
• Darwins theory- some organisms are better adapted to environment, these compete, those better adapted are more likely to survive
• genetic engineering process 1- desired gene is cut from another organisms DNA using restriction enzymes leaving sticky ends
• genetic engineering process 2- gene inserted into vector usng ligase enzyme
• genetic engineering process 3- vector is inserted into the gene of another organisms cell early in development
• genetic engineering process 4- organisms develops with deisred characteristic