B1 Revision 4.5 / 5 based on 3 ratings ? ScienceGenetic variationGCSEOCR Created by: KatieCreated on: 01-12-12 15:30 Where are chromosomes found within a cell? The Nucleus 1 of 20 What are alleles? Different versions of the same gene 2 of 20 What are stem cells? Unspecialised/undifferentiated cells 3 of 20 What's the definition of the word "clone"? A genetically identical organism 4 of 20 What is the genotype? all of the genes an organism has 5 of 20 What is a phenotype? The characteristics it displays 6 of 20 What is a gene? A section on DNA 7 of 20 What does a gene do? Codes for proteins 8 of 20 Is collagen a functional or structural protein? Structural 9 of 20 What determines the phenotype? The combination of alleles 10 of 20 what are genetic disorders caused by? faulty alleles 11 of 20 Name 3 symptoms of huntingtons tremors (shaking) memory loss and poor concentration 12 of 20 what is cystic fibrosis caused by? Recessive alleles 13 of 20 name 3 symptoms of cf thick mucus in the air passages, breathing difficulty and chest infections 14 of 20 what is genetic testing done on? Adult bone marrow, embryo's and children 15 of 20 how are clones made? by asexual reproduction 16 of 20 are identical twins clones? yes 17 of 20 embryonic stem cells are unspecialised and found in early embryo's, TRUE OR FALSE True 18 of 20 what are the chances of getting huntingtons disease if your parent has it? 50% 19 of 20 what are the chances of getting cf from a parent? 25% or 1 in 4 20 of 20
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