K. S. Sodiqova Mirzo Ulug’bek nomidagi O’zbekiston


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K. S. Sodiqova Mirzo Ulug’bek nomidagi O’zbekiston-fayllar.org

100-masala*. G’o’za o’simligida qo’ng’ir tola (FrBr) oq tola (Frbr) ustidan, o’simlikning antotsian rangi (Rp) yashil rangi (rp) ustidan, barg plastinkasining panjasimon-kesik (Ol) shakli panjasimon-bo’linma (ol) shakli ustidan to’liqsiz dominantlik qiladi.
Har uchchala belgi bo’yicha dominant gomozigotali g’o’za o’simliklari har uchchala belgi bo’yicha retsessiv gomozigotali g’o’zalar bilan chatishtirilib, F1 da novvot rang tolali, o’simliklari oraliq rangli va barg plastinkasi panjasimon-bo’lakli bo’lgan duragaylar olindi. F1 duragaylarini o’z-o’zi bilan chatishtirib F2 duragaylari olindi. F2 duragaylarida o’rganilayotgan belgilar bo’yicha qanday ajralish sodir bo’ladi? Olingan F1 duragaylari har uchchala belgi bo’yicha dominant va retsessiv gomozigota ota-ona bilan qayta chatishtirilsa, FB da qanday ajralish sodir bo’ladi?
Masalaning yechilishi:
Belgi Gen
Tolaning qo’ng’ir rangi FrBr
Tolaning oq rangi Frbr
O’simliklarning antotsian rangi Rp
O’simliklarning yashil rangi rp
Barg plastinkasining panjasimon kesik shakli Ol
Barg plastinkasining panjasimon bo’linma shakli ol
qo’ng’ir tola, antotsian rang, oq tola, yashil rang,

panjasimon kesik panjasimon bo’linma


P ♀ FrBrFrBr RpRp OlOl X ♂ FrbrFrbr rprp olol
g FrBr Rp Ol Frbr rp ol
F1 FrBrFrbr Rprp Olol - novvot rang tolali, o’simligi oraliq rangli,
bargi panjasimon bo’lakli
novvot rang tolali, oraliq novvot rang tolali, oraliq

rangli, panjasimon bo’lakli rangli, panjasimon bo’lakli


P ♀ FrBrFrbr Rprp Olol X ♂ FrBrFrbr Rprp Olol
g FrBr Rp Ol FrBr Rp Ol
FrBr Rp ol FrBr Rp ol
FrBr rp Ol FrBr rp Ol
Frbr Rp Ol Frbr Rp Ol
FrBr rp ol FrBr rp ol
Frbr Rp ol Frbr Rp ol
Frbr rp Ol Frbr rp Ol
Frbr rp ol Frbr rp ol
F2 1. FrBrFrBr RpRp OlOl = 1 qo’ng’ir tola, antotsian, panjasimon-kesik
2. FrBrFrBr RpRp Olol = 2 qo’ng’ir tola, antotsian, panjasimon-bo’lakli
3. FrBrFrBr Rprp OlOl = 2 qo’ng’ir tola, oraliq rang, panjasimon-kesik
4. FrBrFrbr RpRp OlOl = 2 novvot rang tola, antotsian, panj. -kesik
5. FrBrFrbr Rprp OlOl = 4 novvot rang tola, oraliq rang, panj.- kesik
6. FrBrFrbr RpRp Olol = 4 novvot rang tola, antotsian, panj. -bo’lakli
7. FrBrFrBr Rprp Olol = 4 qo’ng’ir tola, oraliq rang, panj. -bo’lakli
8. FrBrFrbr Rprp Olol = 8 novvot rang tola, oraliq rang, panj.-bo’lakli
9. FrBrFrBr RpRpolol = 1 qo’ng’ir tola, antotsian, panj. -bo’linma
10. FrBrFrBr Rprp olol = 2 qo’ng’ir tola, oraliq rang, panj. -bo’linma
11. FrBrFrbr RpRp olol = 2 novvot rang tola, antotsian, panj. -bo’linma
12. FrBrFrbr Rprp olol = 4 novvot rang tola, oraliq rang, panj.-bo’linma
13. FrBrFrBr rprp OlOl = 1 qo’ng’ir tola, yashil, panjasimon -kesik
14. FrBrFrbr rprp OlOl = 2 novvot rang tola, yashil, panjasimon-kesik
15. FrBrFrBr rprp Olol = 2 qo’ng’ir tola, yashil, panjasimon-bo’lakli
16. FrBrFrbr rprp Olol = 4 novvot rang tola, yashil, panjasimon-bo’lakli
17. FrbrFrbr RpRp OlOl = 1 oq tola, antotsian, panjasimon-kesik
18. FrbrFrbr Rprp OlOl = 2 oq tola, oraliq rang, panjasimon-kesik
19. FrbrFrbr RpRp Olol = 2 oq tola, antotsian, panjasimon-bo’lakli
20. FrbrFrbr Rprp Olol = 4 oq tola, oraliq rang, panjasimon-bo’lakli
21. FrBrFrBr rprp olol = 1 qo’ng’ir tola, yashil, panjasimon-bo’linma
22. FrBrFrbr rprp olol = 2 novvot rang tola, yashil , panj. -bo’linma
23. FrbrFrbr RpRp olol = 1 oq tola, antotsian, panjasimon -bo’linma
24. FrbrFrbr Rprp olol = 2 oq tola, oraliq rang, panjasimon -bo’linma
25. FrbrFrbr rprp OlOl = 1 oq tola, yashil, panjasimon -kesik
26. FrbrFrbr rprp Olol = 2 oq tola, yashil, panjasimon-bo’lakli
27. FrbrFrbr rprp olol = 1 oq tola, yashil, panjasimon-bo’linma.
Har uchchala belgi bo’yicha to’liqsiz dominantlik hodisasi kuzatilganda fenotipik va genotipik sinflarning soni bir xil bo’lib, 27 taga teng bo’ladi.
F1 duragaylari dominant gomozigotali ota-ona bilan chatishtirilganda:
novvot rang tolali, oraliq qo’ng’ir tolali, antotsian,

rangli, panjasimon bo’lakli panjasimon kesik


P ♀ FrBrFrbr Rprp Olol X ♂ FrBrFrBr RpRp OlOl
g FrBr Rp Ol FrBr Rp Ol
FrBr Rp ol
FrBr rp Ol
Frbr Rp Ol
FrBr rp ol
Frbr Rp ol
Frbr rp Ol
Frbr rp ol
FB 1. FrBrFrBr RpRp OlOl - qo’ng’ir tola, antotsian, panjasimon kesik

2. FrBrFrBr RpRp Olol - qo’ng’ir tola, antotsian, panjasimon bo’lakli


3. FrBrFrBr Rprp OlOl - qo’ng’ir tola, oraliq rang, panjasimon kesik
4. FrBrFrbr RpRp OlOl - novvot rang tola, antotsian, panj. kesik
5. FrBrFrBr Rprp Olol - qo’ng’ir tola, oraliq rang, panj. bo’lakli
6. FrBrFrbr RpRp Olol - novvot rang tola, antotsian, panj. bo’lakli
7. FrBrFrbr Rprp OlOl - novvot rang tola, oraliq rang, panj. kesik
8. FrBrFrbr Rprp Olol - novvot rang tola, oraliq rang, panj.bo’lakli
Sakkizta fenotipik sinflar hosil bo’lib, ularning nisbati 1:1:1:1:1:1:1:1. Dominant gomozigotali va geterozigotali organizmlar hosil bo’ladi.
F1 duragaylari retsessiv gomozigotali ota-ona bilan chatishtirilganda:

novvot rang tolali, oraliq oq tolali, yashil,


rangli, panjasimon bo’lakli panjasimon bo’linma
P ♀ FrBrFrbr Rprp Olol X ♂ FrbrFrbr rprp olol
g FrBr Rp Ol Frbr rp ol
FrBr Rp ol
FrBr rp Ol
Frbr Rp Ol
FrBr rp ol
Frbr Rp ol
Frbr rp Ol
Frbr rp ol
FB 1. FrBrFrbr Rprp Olol - novvot rang tola, oraliq rang, panj.- bo’lakli
2. FrBrFrbr Rprp olol - novvot rang tola, oraliq rang, panj. -bo’linma
3. FrBrFrbr rprp Olol - novvot rang tola, yashil , panj. -bo’lakli
4. FrbrFrbr Rprp Olol - oq tola, oraliq rang, panj. -bo’lakli
5. FrBrFrbr rprp olol - novvot rang tola, yashil, panj.- bo’linma
6. FrbrFrbr Rprp olol - oq tola, oraliq rang, panj. -bo’linma
7. FrbrFrbr rprp Olol - oq tola, yashil, panjasimon -bo’lakli
8. FrbrFrbr rprp olol - oq tola, yashil, panjasimon -bo’linma.
Bu yerda ham sakkizta fenotipik sinflar hosil bo’lib, ularning nisbati 1:1:1:1:1:1:1:1. Geterozigotali va retsessiv gomozigotali organizmlar hosil bo’ladi.



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