Biology 0.0 / 5 ? BiologyYou and Your Genes OverviewGCSEOCR Created by: livcooper_xxCreated on: 20-04-16 19:04 What is variation? Variation is differences between individuals of the same species 1 of 12 Put in order of size: Genes, DNA, Chromosomes, Nucleus, Cell Cell, Nucleus, Chromosomes,Genes, DNA 2 of 12 What is Structural and Functional Proteins? Structural Proteins: For cell growth and repair. Functional Proteins: To speed up chemical reactions 3 of 12 Give examples of structural and functional proteins? Structural: Collagen. Functional: Amylase 4 of 12 What do genes control? Genes control the development of different characteristics by issuing instructions to the cell. 5 of 12 What do DNA molecules form a complete set of instructions for? How the organism should be constructed and How each cell should function 6 of 12 How many chromosomes does a human cell hold? 23 pairs or 46 in total 7 of 12 What is so special about the 23rd pair of chromosomes? They are sex chromosomes which mean they determine the sex/gender of the human 8 of 12 What are Alleles? Alleles are the different versions of the same gene. 9 of 12 What is Dominant allele? Dominant controls the development of the characteristic even if it's present in only one chromosome? 10 of 12 What is a recessive allele? Recessive controls the development of the characteristic only if both alleles are present 11 of 12 What is the difference between homozygous and heterozygous? Homozygous is when two alleles inherited are the same 12 of 12
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