Science 0.0 / 5 ? BiologyDNA and inheritanceGCSEWJEC Created by: charlabCreated on: 28-05-14 22:53 What are Genes/where are they found? Found: in the cell's nucleus. Determine all inherited characteristics of an organism 1 of 21 How are genes linked together? In a long string called chromosomes 2 of 21 What is DNA? chemical molecule that makes up genes, coded information for the production of different proteins 3 of 21 What is a genome? An organism's complete set of genes 4 of 21 What are gamates? Sex Cells 5 of 21 What is a mutation? A change in the structure of the gene, occurs naturally or by ionising radiation 6 of 21 What is Meiosis Division of cells that form sex cells, sperm or egg 7 of 21 What is Haploid? Cell with half number of chromosomes 8 of 21 What is Diploid? Cell with full set of chromosomes 9 of 21 Phenotype Physical characteristics shown e.g male/female 10 of 21 What are Alleles? Genes from each parent that code for the same thing 11 of 21 Homozygous Both alleles are the same (AA) (aa) 12 of 21 Heterozygous Both alleles are different (Aa) 13 of 21 Dominant Capital letter, always wins 14 of 21 Recessive Small letter 15 of 21 Enzymes A chemical that breaks downs cells 16 of 21 Genotype Genetic make-up of an individual- which alleles it has 17 of 21 Homozygote A homozygous individual 18 of 21 Continuous Variation examples a range of variation- height, shoe size, mass 19 of 21 Discontinous Variation examples Distinct categories of variation- blood group, left/right handed, tongue rolling, ear lobes 20 of 21 Why does Variation occur? Because of a mutation in the gene 21 of 21
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