Aqa A-Level Biology Paper 2 Study Guide Graded A+

1. Same species present over long time 2. Populations stable (around carrying capacity) {Ans: Give two features of a climax community (2)}1. Human gene is inserted in the middle of GFP gene (isolated from jellyfish) 2. GFP no longer made in transformed cells but have ampicillin resistance so is grown on agar plate 3. So transformed cells are not fluorescent {Ans: Identifying transformed Bacteria Cells (Green Fluorescent Protein) (3)}Both alleles for a specific gene are different {Ans: Heterozygous}1. Add a healthy dominant allele which will insert into the person's original DNA. {Ans: Suggest how Gene therapy is used to treat a disorder caused by two mutated recessive alleles. (1)}1. Occurs in the same habitat so sympatric speciation 2. Mutation causes different flowering times 3. Seasonal Reproductive separation 4. No gene flow between the organisms so different alleles passed on. 5. Disruptive natural selection 6. Eventually, different species cannot interbreed to produce fertile offspring; {Ans: Lord Howe Island in the Tasman Sea possesses two species of palm tree which have arisen via sympatric speciation. The two species diverged from each other after the island was formed 6.5 million years ago. The flowering times of the two