B1 You and Your Genes 0.0 / 5 ? BiologyYou and your genesGCSEOCR Created by: Stella ThurlowCreated on: 25-04-17 20:24 What are chromosomes? A chromosome is one very long molecule of DNA 1 of 27 Were are chromosomes found? Nucleus 2 of 27 How many chromosomes are ther in a normal human cell? 46 3 of 27 What are Genes? What do they do? Genes are short lengths of a chromosome that controle the production of different characteristics 4 of 27 What are enzymes? Why are they so important? Enzymes are proteins that speed up reactions 5 of 27 What are the 2 types of sex chromosomes in humans? What is needed for a male/female **(female) or XY(male) 6 of 27 What does it mean if someone is a carrier? You containe the alleles for a disease but do not have it? 7 of 27 Why cant you be a carrier for huntingtons? Because it is dominent so if you have one allele then you must have the disease 8 of 27 What are the symptoms of cystic fybrosis? Build up of mucus causing difficult in breathing 9 of 27 What are Alleles Different versions of the same Gene 10 of 27 How do Genes control the different characteristics shown? The gene codes for a protein the having these different proteins causes different characteristics 11 of 27 What does Genotype/Phenotype mean? A Genotype is all the genes it has/ A Phenotype is the characteristics shown 12 of 27 Is a persons weight inherited enviromental or both? Both 13 of 27 How many chromosomes are found in sex cells (Gametes) 23 14 of 27 Why do you look a bit like both parents but identicle to neither? Half your chromosomes come from both parents, so no one has the exact same genes 15 of 27 What does Homozygous/Heterozygous mean? Homozygous means to have 2 alleles the same /Heterozygous means to have t2 alleles that are different 16 of 27 Is the allele for Cystic Fybrosis Dominant or Recessive Recessive 17 of 27 Whats the chance of getting Huntingons if one parent has one copy? 50% 18 of 27 In IVF What is the process of testing embryos for genetc issues? Pre-Implantation Genetic Diagnosis 19 of 27 Other then embryo testing whats another use of Genetic testing? To see if you are a carrier/Before drug perscription 20 of 27 What are 3 issues with genetic testing? Not 100% accurate/arent completely safe/Moral issues with having children/Abortion?/Discrimination 21 of 27 What is a Clone? A genetically identicle organism 22 of 27 How can Bacteria and some plants and animals produce asexually? Bacteria-By division/ Plants-Runners or bulbs/ Animals-greenflys can lay identicle clones 23 of 27 How are identicle twins formed? Once an egg is fertilised at the 8 cell stage the egg splits and 2 seperate organisms form 24 of 27 What are stem cells? Stem cells are inidentified cells that can become any kind of cell 25 of 27 What are the 2 kind of stem cells? And there differences? Embryonic- Can turn into ANY kind of cell/Adult 26 of 27 Describe one way that stem cells could be used to traet an illness? Blood Disease can ue bone marrow to replace old blood cells 27 of 27
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