Keywords B1 4.0 / 5 based on 1 rating ? AccountingGCSEEdexcel Created by: eloiseCreated on: 15-04-13 11:53 46281053197 Across 1. The developmment of a new species over time through a process of repeated natural selection. (9) 6. A group of the same organism which can interbreed to produce fertile young. (7) 7. Caused by the inheritance of two recessive alleles. Effects triggered by dehydration and tiredness. Cannot absorb so much oxygen due to distorted red blood cell shape. Causes joint pain, respiration, weakens immune system. (6, 4) 8. Prove theory by collecting supporting evidence... investigate, collect samples, share with other scientists (peer review) (8) 9. Differenciating characteristics within a species. (9) Down 2. Formation of a new species due to geographical isolation, evolving differenciating characteristics, until interbreeding is no longer possible. (10) 3. the alleles of a particular gene possessed by an organism. (8) 4. When both alleles possessed are different. (12) 5. Genetic disorder caused by the inheritance of two recessive alleles... causes build up of mucus in lungs, suseptability to chest infection, problems with digestion, shortness of breath. (6, 8) 10. Version of a gene that will only have an effect if the other allele is also recessive. (9, 6)
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