cellular control summary

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  • DNA genetic code
    • Polygenic- characteristic coded for by many genes
      • Continuous Variation
        • traits exhibiting CV are controlled by 2 or more genes
        • Each gene provides an additive compnent
        • = polygenes, the characteristics they control are polygenic
        • different alleles at each gene locus have a small effect on the phenotype
        • Untitled
    • homeobox genes-control development of organisms body plan
    • Apoptosis-programmed cell death
    • Monogenic- characteristic coded for by one gene
      • Discontinous variation
        • different alleles at a single gene locus have large effects on the phenotype
        • different gene loci have diffent effects on phenotype
        • e.g- codominance, dominance , recessive patterns of inheritance
      • e.g- codominance, dominance , recessive patterns of inheritance
      • different gene loci have diffent effects on phenotype
      • different alleles at a single gene locus have large effects on the phenotype
    • transcription
      • formation of RNA molecule using length of DNA as a template/ complementary base pairingis used/ catalysed by RNA polymerase
    • Translation
      • stage of polypeptide syntheis / aa assembled at ribosomes
      • Untitled
        • transcription
          • formation of RNA molecule using length of DNA as a template/ complementary base pairingis used/ catalysed by RNA polymerase
  • Continuous Variation
    • traits exhibiting CV are controlled by 2 or more genes
    • Each gene provides an additive compnent
    • = polygenes, the characteristics they control are polygenic
    • different alleles at each gene locus have a small effect on the phenotype
    • Untitled
  • body plans
    • homeobox genes-control development of organisms body plan
    • Apoptosis-programmed cell death

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