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Chromosomen
Gliederung
 Chromosomen
 Chromsosomen- Die
Vorgeschichte
 Thomas Hunt Morgan
 Das große Experiment, die
Taufliege
Chromosomen
 Durch Färben kann die
Chromosom-struktur sichtbar
gemacht werden
 „Farbkörper“
 Fadenartige Strukturen, die
aus der DNA sowie Proteinen
bestehen, und sich im Zellkern
befinden
 Ein normaler Mensch hat 46
Chromosomen, das sind 23
Paare
Chromsosomen - Die
Vorgeschichte
 Mitte 19. Jahrhundert entdeckten
Forscher, durch Färbung einer
Zwiebel, dass die Zellbestandteile
hervorgehoben werden
 Dadurch wird der Zellkern, das
Kernplasma, das punktförmige
Kernkörperchen und der
Kernmembran sichtbar
 Die schleifenartige Bänder lassen
sich gut färben, deswegen nannte
man diese Kernschleifen
Chromsosomen
Thomas Hunt Morgan
 25. Sep. 1866 - 5. Dez. 1945
 US-amerikanischer Zoologe und
Genetiker
 Er klärte durch die
Kreuzungsversuche mit der
Taufliege Drosophila die
grundlegende Struktur der
Chromosomen auf
 Morgan hatte entdeckt, dass die
Gene nacheinander auf den
Chromosomen und er untersuchte
die Reihenfolge und Abstände
zueinander
 Seine Ergebnisse fasste er in
Chromosomenkarten zusammen
Das große Experiment,
die Taufliege
 Haustier der Genetiker
 Ein 3mm kleines Insekt
 Ernährt sich überwiegend von faulen
Obstresten
 Durch die Kreuzungsexperimente mit
der Taufliege konnte Morgan
nachweisen, dass einige
Eigenschaften der Taufliege nicht
unabhängig voneinander vererbt
werden können

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Chromosomen

  • 2. Gliederung  Chromosomen  Chromsosomen- Die Vorgeschichte  Thomas Hunt Morgan  Das große Experiment, die Taufliege
  • 3. Chromosomen  Durch Färben kann die Chromosom-struktur sichtbar gemacht werden  „Farbkörper“  Fadenartige Strukturen, die aus der DNA sowie Proteinen bestehen, und sich im Zellkern befinden  Ein normaler Mensch hat 46 Chromosomen, das sind 23 Paare
  • 4. Chromsosomen - Die Vorgeschichte  Mitte 19. Jahrhundert entdeckten Forscher, durch Färbung einer Zwiebel, dass die Zellbestandteile hervorgehoben werden  Dadurch wird der Zellkern, das Kernplasma, das punktförmige Kernkörperchen und der Kernmembran sichtbar  Die schleifenartige Bänder lassen sich gut färben, deswegen nannte man diese Kernschleifen Chromsosomen
  • 5. Thomas Hunt Morgan  25. Sep. 1866 - 5. Dez. 1945  US-amerikanischer Zoologe und Genetiker  Er klärte durch die Kreuzungsversuche mit der Taufliege Drosophila die grundlegende Struktur der Chromosomen auf  Morgan hatte entdeckt, dass die Gene nacheinander auf den Chromosomen und er untersuchte die Reihenfolge und Abstände zueinander  Seine Ergebnisse fasste er in Chromosomenkarten zusammen
  • 6. Das große Experiment, die Taufliege  Haustier der Genetiker  Ein 3mm kleines Insekt  Ernährt sich überwiegend von faulen Obstresten  Durch die Kreuzungsexperimente mit der Taufliege konnte Morgan nachweisen, dass einige Eigenschaften der Taufliege nicht unabhängig voneinander vererbt werden können