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KROMOSOM & GEN Sambandet mellan… DNA
Alla våra celler innehåller 46 st kromosomer
23 par kromosomer En från mamma och en från pappa i varje kromosompar Två av kromosomerna avgör könet Varje kromosom består av en DNA molekyl
Kromosom innan delning Vi kollar närmare på en bit … ännu närmare
Allt hänger ihop i en trådliknande spiral Om man drar ut den ännu mer…
… så ser man att den består av flera olika avsnitt, gener (eller anlag)
En gen består av ett antal kvävebaser som tillsammans bildar en kod eller ett recept på ett protein  Exempel på proteiner är Hemoglobin och insulin Det finns fyra kvävebaser. T = Tymin G = Guanin C = Cytosin A = Adenin
Kvävebaserna kan bara sitta ihop på ett bestämt sätt. T med A och G med C
Kvävebaserna ”läses” av tre och tre.  En ”triplett” med kvävebaser motsvarar en viss aminosyra På så sätt avgörs i vilken ordning aminosyrorna ska komma Och vilket protein som bildas
Här kommer DNA kopian ut ur kärnan Här läses ”tripletterna” av och paras ihop med rätt aminosyra Det färdiga proteinet paketeras och skickas ut i kroppen
Alltså! Kromosomerna består av en jättemolekyl kallad  DNA Dvs  En   Kromosom  består av  en   DNA  tråd (spiral) Ett avsnitt (del) av  DNA  tråden kallas för  Gen  eller  anlag En  gen (anlag)  är ett recept för ett speciellt protein
Kunskapskontroll ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Nu är det slut! Hej då!!

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Sambandet_kromosom_DNA_gen

  • 1. KROMOSOM & GEN Sambandet mellan… DNA
  • 2. Alla våra celler innehåller 46 st kromosomer
  • 3. 23 par kromosomer En från mamma och en från pappa i varje kromosompar Två av kromosomerna avgör könet Varje kromosom består av en DNA molekyl
  • 4. Kromosom innan delning Vi kollar närmare på en bit … ännu närmare
  • 5. Allt hänger ihop i en trådliknande spiral Om man drar ut den ännu mer…
  • 6. … så ser man att den består av flera olika avsnitt, gener (eller anlag)
  • 7. En gen består av ett antal kvävebaser som tillsammans bildar en kod eller ett recept på ett protein Exempel på proteiner är Hemoglobin och insulin Det finns fyra kvävebaser. T = Tymin G = Guanin C = Cytosin A = Adenin
  • 8. Kvävebaserna kan bara sitta ihop på ett bestämt sätt. T med A och G med C
  • 9. Kvävebaserna ”läses” av tre och tre. En ”triplett” med kvävebaser motsvarar en viss aminosyra På så sätt avgörs i vilken ordning aminosyrorna ska komma Och vilket protein som bildas
  • 10. Här kommer DNA kopian ut ur kärnan Här läses ”tripletterna” av och paras ihop med rätt aminosyra Det färdiga proteinet paketeras och skickas ut i kroppen
  • 11. Alltså! Kromosomerna består av en jättemolekyl kallad DNA Dvs En Kromosom består av en DNA tråd (spiral) Ett avsnitt (del) av DNA tråden kallas för Gen eller anlag En gen (anlag) är ett recept för ett speciellt protein
  • 12.
  • 13. Nu är det slut! Hej då!!