Biology Paper 2 revision combined science gcse 0.0 / 5 ? BiologyDNA and inheritanceEcology and Environmental ScienceGCSEAQA Created by: xaleahCreated on: 28-05-19 13:07 How do fossils arise? Bones 1 of 35 Why can bacteria evolve quickly? Fast division 2 of 35 What is MRSA? Multi drug resistant bacteria 3 of 35 Define phenotype? Your Characteristics 4 of 35 Define Homozygous 2 identical copies of the gene 5 of 35 Define Specification Development of a new species 6 of 35 Define Genotype Your genes 7 of 35 Define Natural selection Process by which a species can evolve 8 of 35 Define Evolution A gradual change in a species over time 9 of 35 Define Dominant It only needs one allele to be present for phenotype 10 of 35 Define Chromosome Long molecule of DNA 11 of 35 Define recessive 2 copies of gene needed 12 of 35 Define genome All of the DNA within an organism 13 of 35 Define allele Different versions of genes 14 of 35 Define gene Section of DNA that controls the characteristics 15 of 35 Why is the development of antibiotics so slow? As theres lots of work involved and little incentive for drug companies. 16 of 35 What things lead to extinction? Increase in predators/Hunting/Decrease in food/Change in environment 17 of 35 Define Extinction A species dies out 18 of 35 What evidence is there for evolution? The fossil record 19 of 35 What are male gametes in plants? Pollen 20 of 35 What sex is xy? Male 21 of 35 What sex is **? Female 22 of 35 How many pairs of chromosomes are there in a human body cell? 23 pairs 23 of 35 What is cystic fibrosis? Build up of mucus in the lungs. 24 of 35 Is cystic fibrosis dominant or recessive? Recessive 25 of 35 Is polydactyly dominant or recessive? Dominant 26 of 35 What is polydactyly? Extra fingers or toes. 27 of 35 Define Hetrozygous Different copies of the same gene 28 of 35 Define Gamete sex cells 29 of 35 What is the basic structure of DNA? Double Helix 30 of 35 What are the female gametes in animals? Eggs 31 of 35 What are the male gametes in animals? Sperm 32 of 35 What are the female gametes in plants? Eggs 33 of 35 How many cells are produced at the end of meiosis? They are 4 cells produced 34 of 35 How many cells are produced at the end of mitosis? There are 2 cells produced. 35 of 35
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