Genetikadan masalalar to‘plami va ularni echish usullari

96-masala. G‘o‘za o‘simligida cheklanmagan hosil shoxi (S) cheklangan hosil shoxi (s) ustidan, gulyonbarglarining yuraksimon shakli (Fg) ingichka shakli (fg) ustidan, gultojibarglarining to‘q sariq rangi (Y₁) och sariq rangi (y₁) ustidan to‘liq dominantlik qiladi.
Quyidagi genotipli organizmlar chatishtirilganda keyingi avlodda olinadigan organizmlarning genotip va fenotipini aniqlang:
1) SS Fg Fg Y₁Y₁ x ss fg fg y₁y₁; 2) Ss Fg fg y₁y₁ x ss fg fg y₁y₁;
3) Ss Fg fg Y₁y₁ x ss fg fg y₁y₁; 4) Ss Fg fg Y₁y₁ x Ss Fg fg Y₁y₁.


97-masala*. G‘o‘za o‘simligida cheklanmagan hosil shoxi (S) cheklangan hosil shoxi (s) ustidan to‘liq, o‘simlikning antotsian rangi (Rp) yashil rangi (rp) ustidan to‘liqsiz, qo‘ng‘ir tola (Fr^Br) oq tola (Fr^br) ustidan to‘liqsiz dominantlik qiladi. CHeklanmagan hosil shoxli, antotsian rangli va tolasi qo‘ng‘ir bo‘lgan g‘o‘za o‘simligi har uchchala belgi bo‘yicha retsessiv gomozigotali boshqa g‘o‘za o‘simligi bilan chatishtirilib, F₁ da cheklanmagan hosil shoxli, oraliq rangli va tolasi novvot rang bo‘lgan duragaylar olindi. F₁ duragaylari o‘z-o‘zi bilan changlantirilib F₂ duragaylari olindi. F₂ da hosil bo‘ladigan fenotipik va genotipik sinflarni aniqlang.
Masalaning echilishi:
cheklanmagan hosil shoxi, cheklangan hosil shoxi,
antotsian rang, qo‘ng‘ir tola yashil rang, oq tola
P ♀ SS RpRp Fr^Br Fr^Br X ♂ ss rprp Fr^br Fr^br
g S Rp Fr^Br s rp Fr^br
F₁ Ss Rprp Fr^Br Fr^br - cheklanmagan hosil shoxi, oraliq rang, novvot rang tola

cheklanmagan hosil shoxi, cheklanmagan hosil shoxi,

oraliq rang, novvot rang tola oraliq rang, novvot rang tola
P ♀ Ss Rprp Fr^Br Fr^br X ♂ Ss Rprp Fr^Br Fr^br
g S Rp Fr^Br S Rp Fr^Br
S Rp Fr^br S Rp Fr^br
S rp Fr^Br S rp Fr^Br
s Rp Fr^Br s Rp Fr^Br
S rp Fr^br S rp Fr^br
s Rp Fr^br s Rp Fr^br
s rp Fr^Br s rp Fr^Br
s rp Fr^br s rp Fr^br
F₂ 1. SS RpRp Fr^Br Fr^Br - 1 cheklanmagan shoxli, antotsian, qo‘ng‘ir tola;
2. SS RpRp Fr^Br Fr^br - 2 cheklanmagan shoxli, antotsian, novvot rang tola;
3. SS Rprp Fr^Br Fr^Br - 2 cheklanmagan shoxli, oraliq rang, qo‘ng‘ir tola;
4. Ss RpRp Fr^Br Fr^Br - 2 cheklanmagan shoxli, antotsian, qo‘ng‘ir tola;
5. Ss Rprp Fr^Br Fr^Br - 4 cheklanmagan shoxli, oraliq rang, qo‘ng‘ir tola;
6. Ss RpRp Fr^Br Fr^br - 4 cheklanmagan shoxli, antotsian, novvot rang tola;
7. SS Rprp Fr^Br Fr^br - 4 cheklanmagan shoxli, oraliq rang, novvot rang tola;
8. Ss Rprp Fr^Br Fr^br - 8 cheklanmagan shoxli, oraliq rang, novvot rang tola;
9. SS RpRp Fr^br Fr^br - 1 cheklanmagan shoxli, antotsian, oq tola;
10. SS Rprp Fr^br Fr^br - 2 cheklanmagan shoxli, oraliq rang, oq tola;
11. Ss RpRp Fr^br Fr^br- 2 cheklanmagan shoxli, antotsian, oq tola;
12. Ss Rprp Fr^br Fr^br - 4 cheklanmagan shoxli, oraliq rang, oq tola;
13. SS rprp Fr^Br Fr^Br - 1 cheklanmagan shoxli, yashil, qo‘ng‘ir tola;
14. SS rprp Fr^Br Fr^br - 2 cheklanmagan shoxli, yashil, novvot rang tola;
15. Ss rprp Fr^Br Fr^Br - 2 cheklanmagan shoxli, yashil, qo‘ng‘ir tola;
16. Ss rprp Fr^Br Fr^br - 4 cheklanmagan shoxli, yashil, novvot rang tola;
17. ss RpRp Fr^Br Fr^Br- 1 cheklangan shoxli, antotsian, qo‘ng‘ir tola;
18. ss Rprp Fr^Br Fr^Br - 2 cheklangan shoxli, oraliq rang, qo‘ng‘ir tola;
19. ss RpRp Fr^Br Fr^br- 2 cheklangan shoxli, antotsian, novvot rang tola;
20. ss Rprp Fr^Br Fr^br - 4 cheklangan shoxli, oraliq rang, novvot rang tola;
21. SS rprp Fr^br Fr^br - 1 cheklanmagan shoxli, yashil, oq tola;
22. Ss rprp Fr^br Fr^br - 2 cheklanmagan shoxli, yashil, oq tola;
23. ss RpRp Fr^br Fr^br - 1 cheklangan shoxli, antotsian, oq tola;
24. ss Rprp Fr^br Fr^br - 2 cheklangan shoxli, oraliq rang, oq tola;
25. ss rprp Fr^Br Fr^Br - 1 cheklangan shoxli, yashil, qo‘ng‘ir tola;
26. ss rprp Fr^Br Fr^br - 2 cheklangan shoxli, yashil, novvot rang tola;
27. ss rprp Fr^br Fr^br - 1 cheklangan shoxli, yashil, oq tola;
F₂ da hosil bo‘ladigan fenotipik sinflar
1. CHeklanmagan shoxlanishli, antotsian rangli, qo‘ng‘ir tola - 3
2. CHeklanmagan shoxlanishli, antotsian rangli, novvot rang tola- 6
3. CHeklanmagan shoxlanishli, antotsian rangli, oq tola - 3
4. CHeklanmagan shoxlanishli, oraliq rangli, qo‘ng‘ir tola - 6
5. CHeklanmagan shoxlanishli, oraliq rangli, novvot rang tola - 12
6. CHeklanmagan shoxlanishli, oraliq rangli, oq tola -6
7. CHeklanmagan shoxlanishli, yashil rangli, qo‘ng‘ir tola - 3
8. CHeklanmagan shoxlanishli, yashil rangli, novvot rang tola - 6
9. CHeklanmagan shoxlanishli, yashil rangli, oq tola - 3
10. CHeklangan shoxlanishli, antotsian rangli, qo‘ng‘ir tola - 1
11. CHeklangan shoxlanishli, antotsian rangli, novvot rang tola - 2
12. CHeklangan shoxlanishli, antotsian rangli, oq tola - 1
13. CHeklangan shoxlanishli, oraliq rangli, qo‘ng‘ir tola - 2
14. CHeklangan shoxlanishli, oraliq rangli, novvot rang tola - 4
15. CHeklangan shoxlanishli, oraliq rangli, oq tola - 2
16. CHeklangan shoxlanishli, yashil rangli, qo‘ng‘ir tola - 1
17. CHeklangan shoxlanishli, yashil rangli, novvot rang tola - 2
18. CHeklangan shoxlanishli, yashil rangli, oq tola - 1
Bitta belgi bo‘yicha to‘liq, ikkita belgi bo‘yicha to‘liqsiz dominantlik hodisasi kuzatiladigan bo‘lsa, F₂ da 18 ta fenotipik sinflar hosil bo‘ladi. Ularning nisbati 3:6:3:6:12:6:3:6:3:1:2:1:2:4:2:1:2:1.
Genotipik sinflar soni - 27 ta.